All right, you wanna be a real ramblin’ earth shaker? Somebody who changes the world and gets recognized in the history books? K. Anders Ericsson, the guy who created that ten-thousand-hour theory of expertise, says there ain’t no two ways about it; you’re gonna need a mentor: “These findings are consistent with a study of internationally successful athletes, scientists, and artists, where [Benjamin] Bloom (1985) found that, virtually without exception, each individual had been trained by a master teacher, who had trained earlier students to reach an international level.”