Positive feedback loops are the opposite.
Once the temperature is back to the setting on the thermostat, the heat turns off. For example, if the temperature drops in the house too much, then the thermostat turns on the heat. A negative feedback loop compensates to stabilize change. Using this lens, we see the world in terms of negative and positive feedback loops. Systems thinking provides a complementary way of approaching the same phenomenon. So an environmental system that was stable for thousands of years suddenly underwent a rapid and cascading series of changes until it reached a new point of stability that could accommodate the invasive species. For example, they may have helped spread seeds of trees and bushes, as birds often do. Those birds interacted with other species. Those rats killed off entire species of flightless and ground-nesting birds. For example, when Europeans came on ships to Australia, New Zealand, and the surrounding islands, the ships brought rats with them. But when just the right pressures come along, it can shift suddenly and dramatically until it finds a new equilibrium. An ecosystem can seem remarkably stable and resilient for a very long time. I’ve always been fascinated by the evolutionary biology concept of punctuated equilibrium. But what interests me now is that significant changes finally seem afoot for education. It could have been driven by the work I was doing, a hot product category, or something that bothered me.
I’ve always written about whatever interested me at the time.
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