Walls We're so adept at building walls -- walls to separate 'us' from 'them' -- from the ancient walls of Jericho and the Great Wall of China, to walls of more recent times, built to separate 'us' from 'them', like the Berlin Wall, the India-Pakistan fence, Kuwait-Iraq fence, Korea's DMZ, US-Mexico fence, Zambia-Angola fence, and the fence separating the Turkish and Greek sides of Cyprus. Now Israel is building walls to keep out or in, depending on the way you look at it, the Palestinians and terrorists. Walls are short-term and ill conceived -- they never solve the problem, and eventually, the problem of the Palestinians will need to be solved. (Here's a comparison of the modern walls [PDF].)