Why is Google+ designed the way it is?

Back when he worked at Google, Facebook product manger Paul Adams did a bunch of research that he says "formed a cornerstone of the Google social strategy."

That research culminated in a presentation called "The Real Life Social Network."

Its basic premise was that while "the social web is not going away," Facebook and other social networks "donʼt match the social networks we already have ofﬂine."

Sounds a lot like Google's Google+ pitch, doesn't it?

Lucky for all of us, Adams says we can reproduce the presentation here, for you.