Our destiny is in our hands. On the new road, we must now go forward. For more than 10,000 years man has had cultural progress at the price of genetic stagnation or regression. No longer is it necessary for him to pay such a huge and intolerable price. He can have both cultural and genetic progress.
Intelligent selection is neither new nor untried.
Since man first domesticated plants and animals, he has used it with increasing effectiveness. He has taken the sour wild crabapple and transformed it into a sweet, delicious and much more nutritious fruit. He has taken wild chickens and doubled their size and increased their egg-laying capacity many times. He has taken wild dogs and created canines of greater strength, greater speed and quicker minds. Intelligent selection offers man an opportunity never given to any other species-a chance to transcend the limitations and cruelties of the natural selection which shaped his destiny for so long.