The author mentions that most successful sprinters have been Jamaican or American rather than African. Many American professional sports leagues have a greater

The author mentions that most successful sprinters have been Jamaican or American rather than African. Many American professional sports leagues have a greater percentage of black players than white players. Both of these facts lead me to believe that the black people in the Americas have a genetic advantage due to filtering out of weaker individuals through the trials brought on by slavery. Consider- many modern American and Jamaican blacks are descendants of slaves. To arrive in the Americas those slaves had to survive a horrendous journey across the Atlantic in a slave ship (a far more physically challenging experience than the one experienced by the average European colonist on his trip across the ocean). They then had to survive the physical challenges associated with being a slave. The net result is that descendants of these slaves have a genetic profile that was passed down from the strongest survivors, making them physically stronger than either African blacks or non-black Americans.