When a new building block is discovered, the result is usually a range of innovations.

Model building is the art of selecting those aspects of a process that are relevant to the question being asked. As with any art, this selection is guided by taste, elegance, and metaphor; it is a matter of induction, rather than deduction. High science depends on this art.

nonlinear interactions almost always make the behavior of the aggregate more complicated than would be predicted by summing or averaging.

Unwrapping occurs when the "solution" is explicitly built into the program from the start.

When a new building block is discovered, the result is usually a range of innovations.

The measure of performance of any given agent is the amount of money it accumulates through its actions.

If we are to understand the interactions of a large number of agents, we must first be able to describe the capabilities of individual agents.