Stress is the system's response to demand, challenge, uncertainty or change.
Inside the School
InsideISS treats stress partly as load. Physical, cognitive, emotional and social demands can accumulate even when no single demand is extreme.
In everyday life
No single demand seems impossible: a delayed train, two messages, a deadline and a noisy room. Together they use enough capacity that a small decision becomes the final load.
Stress can also support focused action when the demand is clear and recovery follows. The School mobilizes, completes the task and returns resources afterward.
System connections under load
Stress connects demand with capacity across every World. It becomes harder when uncertainty, duration or lack of control keeps the system mobilized. Regulation may involve changing the state, but it may also require removing a demand, asking for support or accepting that the schedule—not the person—is overloaded.
Important nuance
Stress is not automatically harmful. Short-term demand can be useful; difficulty grows when load repeatedly exceeds recovery and available capacity. Connected paths: System Load · The Furnace · Fatigue · Regulation Loop
Stress becomes easier to understand when the School looks at total demand and recovery together.