An organism (You're one.) is a system. As is a family, a society, or a population. Donella Meadows does a wonderful job helping us look at things and their behaviors as systems, as opposed to linear, A causes B-type explanations. Highly recommended.
When I was 14, I walked into the Hazelwood Branch of the Carnegie Library on my way home from Louis Field with my basketball under my arm and changed my life.
