In Malcolm Gladwell's latest book Outliers he uses hockey players as an example of how genetics (or talent) isn't necessarily a deciding factor. Top-level Cana

In Malcolm Gladwell's latest book Outliers he uses hockey players as an example of how genetics (or talent) isn't necessarily a deciding factor. Top-level Canadian hockey players are disproportionally born in the early months of a year. This is because the cutoff for deciding which league to play in is January 1st. Kids born in the first half of the year are older and bigger than the other kids. They make it onto the best teams in the best leagues and get more practices. Ultimately this advantage allows them to play professionally at a higher rate.