"... because the skull and jaw of modern man is much smaller than that of our ancestors, most people do not have enough room for wisdom teeth..." (1)
That's right. Wisdom teeth is a visible sign of evolution. It looks like the human lower jaw is shrinking over time. This leaves less room for those wisdom teeth. Some people never get wisdom teeth and there are children born today that aren't even born with the buds for them. Some say this is because people today are maturing faster. (2) Some say the early maturation isn't evolution but better nutrition. (2) Others say that the increased chewing that ancient man had to do stimulated the length of the lower jaw. (3) I didn't know that Cocoa Puffs were so nutritious! Better nutrition or evolution, wisdom teeth cause problems and the lucky kiddies of today and tomorrow won't have to deal with them.
(1) http://www.smiles4ever.com/oralsurgery.htm
(2) http://www.jackcuozzo.com/wisdom.html
(3) http://www.animated-teeth.com/wisdom_teeth/t1_wisdom_tooth.htm