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

This subtitle better covers the tense of who benefited when : today and in the past since 1940.

And it moves the fact that all of us is what the story is actually all about to the story's foreword.

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

This sub-title at least avoids the dreaded "XX : How .." phrase.