If Chua and Rubenfeld’s theory can’t explain the success of certain groups, then what might? Hart and Chabris point out that, although it seems appealing to think that we can identify a group of learnable traits that determine success, there is scant evidence for such a formula. The idea of a “triple package” may seem compelling because it seems to fit with our own personal observations and common stereotypes about immigrants. In addition, the theory meshes well with the belief that success depends on one’s hard work and personal qualities, rather than one’s circumstances. But, as best we know, success is best explained by such unsurprising factors as being smart, being conscientious, and having the good fortune of growing up in a financially stable environment.