Manhattan is where America began.

For liberalism is a delicate thing. It encompasses so much -- constitutional government, democratic elections, freedom of worship, civil rights, free trade -- that we think of it as timeless and universal. But liberalism came into being in a real place and time, like a flame it has wavered in various eras, and it can be snuffed out.

Embedded in this outlook is an idea of the body as a machine, so that illness is seen as a breakdown of the machine, healing involves repairing the broken parts, and a doctor is a kind of mechanic with medications as his or her tools.