[Spexxvet]

My observation is that it is the parents who are mostly responsible. I guess there's a certain minimum level of genetic or biological "equipment" necessary, but it's Mom and Dad who instill the value of "thinking" into their children, who, by example, show that "thinking" can be fun and interesting, who cultivate curiosity and creativity in their children, reward excellent behavior and results, provide the tools necessary to learn, and create an environment favorable to "thinking".