Anatomy of a System: The Object Level
Where this fits: This is the second chapter of SiD Theory, and the largest in the book. Chapter 1.1 established that sustainability is a state of a complex, dynamic system. This chapter explains what that system looks like from the inside: its layers, its categories, its network properties, and its system-level indicators. If Chapter 1.1 is the "what," this chapter is the "how." Everything that follows in SiD practice builds on the structure introduced here.
Three Layers: System, Network, Object (SNO)
A system in SiD is a set of objects and relations between individual components (agents) that operate together, exchanging information, energy, materials, value, and other resources. Systems are not real in the way that rocks are real. They are a mental and analytical model, a framework for understanding the world more comprehensively.
A city can be seen as a system. So can the pond in your neighbor's yard, our entire civilization, a company, or a government. Systems are defined by their boundaries, and they operate in time, space, and context.
In SiD, every system consists of three layers, called SNO:
| Layer | What it contains |
|---|---|
| System | The holistic view of all objects and relationships together, including emergent behavior |
| Network | All the relations, connections, and flows between objects |
| Object | The collection of physical elements in the system |
The Object level is the tangible stuff. The Network is the web of relationships between that stuff. The System is everything seen as a whole, including properties that emerge only when you look at the complete picture.
You can introduce more layers between these three, but for general use, these are sufficient. We will examine each level, then introduce the tools, indicators, and properties that belong to them.
Part 1: The Object Level
The Object level contains all the physical components of a system: buildings, people, trees, money, energy, materials, laws, traditions. It is the inventory of "what is there."
On its own, an inventory is not enough. Listing the components of a city does not explain how it functions. But systematic categorization of objects is the first step toward understanding any system.
SiD uses a categorization tool called ELSI to organize the Object level.
ELSI-8: Eight Categories of Everything
ELSI-8 (sometimes shortened to ELSI) is SiD's framework for categorizing objects across eight domains that span all physical reality relevant to human systems. The eight categories, from most fundamental to most personal, are:
- Energy -- the basic building block of the universe
- Land use (sometimes labeled Materials) -- physical matter and material flows
- Materials -- the substances we use, consume, and discard
- Ecosystems -- the living infrastructure that sustains all life
- Species -- the biodiversity we depend on and share the planet with
- Culture -- the patterns of interaction between people
- Economy -- the exchange of goods, services, and value
- Health and Happiness -- individual wellbeing as the ultimate purpose
(Note: In some SiD versions, ELSI-8 is condensed into ELSI-4, grouping the eight into four broader categories.)
ELSI is Nested
ELSI's categories are not a flat list. They nest inside each other. Each higher category is contained within the one below it, reflecting a causal relationship:
- All materials are made from energy. Materials are a subset of the energy domain.
- All ecosystems are built from materials.
- Species depend on ecosystems.
- Human culture is a subset of species behavior.
- Economy is a subset of culture.
- Each individual exists within the economy and culture.
- Individual health and happiness is the innermost layer.
This nesting reveals something important: when something changes at a lower level (say, energy or ecosystems), it affects everything above it. Ecology has higher causal significance than economy, though both matter. This hierarchy helps guide discussions about priority. It is a powerful mental tool.
Using ELSI in Practice
ELSI is a brainstorming and categorization tool for the Object layer. It helps teams scan all dimensions of a challenge, surface blind spots, and map relationships.
A common exercise is the ELSI Impact Scan: assign each ELSI-8 category to a group, brainstorm what objects, factors, and areas of interest exist for a given challenge in each category, and map them visually. This quickly reveals which areas receive the most attention and which are neglected. In practice, Species and Ecosystems almost always receive the least attention, which is revealing and concerning given that biodiversity loss is among our most pressing survival challenges.
Important warning: ELSI is so intuitively satisfying that teams sometimes forget the Network and System layers exist. ELSI categorizes objects. It does not, by itself, analyze the relationships between them or the behavior of the whole. An ELSI inventory is never enough without also involving the Network and System levels.
The Eight Categories in Depth
Energy
Includes: radiation, chemical, electricity, heat, motion, wind, solar, geothermal, magnetic
Energy is the basic building block of the universe. It exists from the galactic scale to the subatomic. It is vital for survival and abundantly available in many forms.
Energy cannot be created or destroyed. It transforms from one type to another, flowing from high-energy states to low-energy states (the second law of thermodynamics). Different states have different usefulness. Converting electricity (high state) to heat (low state) is easy. Converting heat back to electricity is expensive and lossy.
The efficiency principle: Use the energy type that matches what is needed. Heating a house with solar thermal collectors is more efficient than converting sunlight to electricity with PV panels and then running electric heaters.
Fossil to renewable: Most of society runs on fossil fuels (oil, gas, coal), which produce the CO2 concentrations driving climate change. The transition to renewable sources (solar, wind, hydro, geothermal, biomass) is the central energy challenge. A key characteristic of wind and solar is fluctuation. Solutions include energy storage, smart grids that balance supply and demand across large networks, and biomass as a storable renewable. Simple low-tech solutions often exist alongside high-tech ones; systems analysis helps find them.
Materials
Includes: water, fertilizer, metals, wood, ceramics, plastics, textiles, fuels, greenhouse gases
The atoms of the periodic table, combined in diverse molecular structures, form our physical world. Some critical materials are running out in ways that may surprise you. Fresh water. Phosphate (essential for fertilizer and life). Specific types of sand (for microchips). Rare earth elements (for electronics).
Modern material flows are less than 100 years old. The industrial revolution scaled extraction and production to the point where discarding after a single use became cheaper than reusing. That pattern has barely changed.
We have also unleashed materials that life has no tolerance for. Radioactive substances, synthetic chemicals, and plastics cause enormous damage. Plastics create dioxins when burned, microparticulates when degraded, and environmental destruction when discarded.
Four material challenges:
- Switch from finite sources to bio-based materials that benefit ecosystems during production
- Change linear production (mine, use, discard) to circular, closed-loop life cycles
- Stop using harmful materials and start collecting the ones already loose in our ecosystems
- Dematerialize the economy by using ecosystem services and service-based models instead of heavy material systems
Tools: Life Cycle Assessment (LCA) is the standard method for evaluating material impacts from inception to end of life.
Ecosystems
Includes: oceans, rivers, mountains, plains, air, climate, soil, forests, land use
Ecosystems are the bridges to life. They consist of "dead" materials and energy cycles that create conditions for life. They are oceans, plains, rivers, and swamps. They clean the water we drink, build the soil our food grows in, and form the air we breathe.
Ecosystems are never in balance. They are always changing. But they can be in more or less healthy states. Climate change, driven by added carbon dioxide, is altering weather systems, raising sea levels, and shifting habitats. The problem is not change itself but the rate of change. Species cannot adapt fast enough. Island nations are disappearing.
The services ecosystems provide (cleaning air and water, creating habitats, providing nourishment) operate at a scale we could never replace with technology. The Natural Capital framework attempts to quantify the value of these services, because when nature is valued at zero, it gets used for nothing.
Species
Includes: mammals, birds, insects, bacteria, amphibians, fungi, trees, plants
Life on Earth exists in a multitude of species, believed to stem from a single origin. We rely on these networks of species for food, water, medicine, materials, and habitable environments. These networks are under stress.
We are witnessing the sixth mass extinction event since the birth of life. The rate of species disappearance is between 1,000 and 10,000 times the natural extinction rate. Nearly 30% of amphibian species and 21% of mammals are threatened. The main cause is human activity.
This matters for pragmatic reasons, not just ethical ones. Biological systems can process materials, create structures, and provide functions that our technology cannot match. Switching to a bio-based economy depends on other species. Protecting biodiversity is a developmental priority.
When teams do ELSI brainstorms, the Species section almost always gathers the fewest ideas. This gap between our awareness and the scale of the crisis is itself informative. Pay special attention to Species and Ecosystems in any group process.
Culture
Includes: community, politics, law, art, education, tradition, language
Culture is the collection of foundational interactions between us. It includes all the ways we act, interact, and exchange. Some patterns are evolutionary, grown over thousands of years. Others are new and rapidly changing.
Education is the cultural equivalent of bread and water. It is the most fundamental expression of connectivity on the Network level. Any culture that restricts or underfunds education trades short-term financial gain for future societal decline. A systems analysis shows this as clearly as arithmetic. Unfortunately, this remains pervasive, possibly because political cycles last 4 to 5 years while educational impacts take 10 to 20 years to register.
Knowledge exchange extends beyond education. Patents, governmental secrecy, and corporate intellectual property restrict the free flow of knowledge. Because knowledge breeds knowledge, restricting it creates a spiraling effect of disenfranchisement. The open source movement can be seen as part of the quest for basic human rights.
Power is shifting from ownership of physical property to control of data. The most valuable companies now deal in information. The internet has opened new territory to reorder the power landscape.
Economy
Includes: financial systems, transportation, employment, trade, legal entities
Economy is the logistic nervous system of society. It is entirely defined, controlled, and embedded within culture, yet often treated as more important. Without culture, there is no economy. Economy is a cultural expression, like art and science.
Two themes dominate. First: unequal wealth distribution and poverty. Map the causal loops of any large societal problem (disease epidemics, terrorism, resource depletion, addiction) and poverty appears as a major driver. Addressing poverty is a systemic goal in itself.
Second: the growth fallacy. No organism on this planet requires consistent systemic growth to survive and procreate. Growth in a finite space is always fatal. The entrenched pursuit of growth gives rise to parasitic mechanisms, including artificial inflation that can enslave populations into lives of infinite toil.
The most valuable economic component is labor. Having the right to work is having the right to a meaningful existence (provided the work is fair and ethical). Through this value, economy feeds directly into health and happiness.
Health
Includes: medicine, food, sports, healthy environments, safety, shelter
Physical health and mental health are closely interlinked. Stress (decidedly mental) affects physical health, and vice versa.
The leading cause of death globally is ischemic heart disease. The highest-impact factors: diet, smoking, blood pressure (stress), and lack of physical activity. In industrialized societies, processed food is everywhere; fresh food is hard to find. The result is malnutrition, obesity, depression, and a cascade of related issues concentrated in disenfranchised communities. There is poverty again.
Air and noise pollution in cities is rising. Access to fresh water remains a major concern outside the western world (1.5 million people die annually of diarrheal diseases linked to poor sanitation). Living in cities with less access to nature correlates with increasing stress.
The aging "silver society" presents new systemic challenges: how to enable flourishing when a majority of the population is no longer working, how to develop environments for meaningful lives beyond employment, how to handle increasing pressure on medical systems.
Happiness
Includes: stress, purpose, freedom, free time, social connectivity, self-development, access to nature
Happiness sits at the top of the ELSI stack because it is the driver behind individual action. What constitutes happiness varies between individuals, cultures, and life stages. But certain universal drivers hold: free time spent at our choosing, the ability to self-realize, time with friends and family, and repeated time in nature.
Measuring happiness can be as simple as asking someone how happy they are. Different researchers identify different factors. Carl Jung listed five (health, relationships, beauty, satisfactory work, philosophical resilience). The World Happiness Report uses six (GDP per capita, life expectancy, social support, trust, freedom, generosity). Roger Walsh identifies eight therapeutic lifestyle changes.
Rather than chasing a complete list, consider the reverse: what makes us unhappy? Imprisonment, physical pain, seeing loved ones hurt, stress, inability to express ourselves, disconnection, injustice. Given a particular situation (a neighborhood redesign, a company policy), this reverse approach helps narrow the relevant happiness factors.
Since happiness drives individual action, it is often where we look for triggers to stimulate system change. If we want people to take the stairs instead of the elevator, we make the stairs more enjoyable.
Case Study: Redefining Health Through SiD
For years, health has been viewed as the absence of disease. That framing is not useful when trying to understand what healthcare should be.
Through SiD's lens, health is a state of a complex dynamic system. Internal and external "objects" (hormones, food intake, exercise) interact on a network level to produce the state of the health system as a whole.
To qualify as healthy, the system needs to be:
- Resilient: able to recover from imbalance
- Harmonious: not attacking itself
- Autonomous: supplied with the right resources (food, water, air, sunlight, exercise) and free to seek better conditions
This framing recognizes that experiencing physical or mental issues from time to time is part of normal operations. Treatment can focus on establishing long-term resilience rather than reducing individual symptoms.
In mental health, research increasingly shows that disorders are not fixed entities but emerge from interactions between biopsychosocial aspects. Using SiD-like methodologies to map a patient's system (mood, anxiety, genetics, lifestyle, social environment, protective factors) provides better diagnosis and more effective intervention than a unified approach. Solutions become individualized roadmaps combining medicinal, therapeutic, biophysical, psychological, behavioral, and cultural elements.
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