brown hair?

Here’s what I read in one of cecil’s columns http://www.straightdope.com/classics/a2_317b.html:

it seems to me, we might just as plausibly conclude that the reason our hair is brown (most people, anyway) is that it enabled our monkey ancestors to hide amongst the coconuts

Apparently the straight doper believes that most people have brown hair. The teeming billions in China, India, Africa etc. may beg to differ.

Adjusted link to the article:
Why is the sound of fingernails scraping a blackboard so annoying?

Above link broken. Here it is.