"Agape's Manhattan Project : How ten billion of us benefited when a dying Manhattan doctor put saving ten others above his own life"

This possible sub-title is much more conventional - breathlessly banal even.

Along the lines of "XXX: how the invention of trivial-seeming Y  actually changed our whole world for the better forever !!!

And even more customer oriented --- note the word 'benefited' !

Every book proposal always has to say how the potential book customer is to benefit from purchasing it, literary agents and editors tell every would be nonfiction author.