David Epstein tries to provide objective study of a tough subject: why are some races or ethnic groups more athletic than others? He examines the "rules" of practice but also geographic and genetic factors that suggest race is more than just a social construct. If nothing else, this should provide some lively half time conversations during football season!
http://www.washingtontimes.com/news/2013/aug/26/book-review-the-sports-gene/