[throwaway5590]

Intelligence is the primary determinant in the sense that you need intelligence to make the innovations which drive society forward. But of course, social factors are important and to be such as to allow intelligent people to achieve their potential.

[Apocryphon]

It would seem that whenever you engage in any endeavor that involves more than one person, social intelligence immediately becomes relevant. I'm not at all convinced that the solutions to current problems will be solved by intelligence alone. Social factors, group dynamics, teamwork are all vital. There was no single genius behind the Manhattan Project.