|Social Darwinism didn't work. It was tried by the Nazis in their Hitler Youth. They believed in the survival of the physically fittest, and had their youth go on long hikes, do calisthenics, even dig tank traps, suffer bullying.
Those young people, with the exuberance of youth, even manned tanks at the Battle of Normandy. They fought well, but the philosophy of Nietzsche, Schopenhauer, et al. which ruled them probably did them in.
We live in a country where nobody has dared use youngsters in that way. Our Boy Scouts and Girl Scouts have exemplary programs. The few teachers who teach the wrong thing are washed out by reality, even in colleges.
We may not have the top grades in math, but our kids have their feet on the ground.