QUOTE OF THE DAY. The Philadelphia Inquirer's Andrew Cassel reports on an anthropologist's taxonomy of social interactions, including market pricing.

In other words, to have an intuitive grasp of economics, you might just need to take a step or two up the evolutionary ladder.

The context properly takes some of the sting out of that sentence. Read and understand the article, and review the comments at Economist's View, where I found the link to the article.