这是个强调句,还原回普通句为：The use to which it is put decides its valuce of society.再把介词to放回原来的位置,即,【The use】【 which】【 it is put to】【 decides its value of society】.这是个定语从句,再把它分解为两个简单句,It is put to use,and the use decides its value of society.