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

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

With theory, we can separate fundamental characteristics from fascinating idiosyncrasies and incidental features. Theory supplies landmarks and guideposts, and we begin to know what to observe and where to act.

From the point of view of physics, it is a miracle that [seven million New Yorkers are fed each day] without any control mechanism other than sheer capitalism.

The multiplier effect is a major feature of networks and flows. It arises regardless of the particular nature of the resource, be it goods, money, or messages.

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

The recycling of resource by the aggregate behavior of a diverse array of agents is much more than the sum of the individual actions.