From the outside looking in, the Valley and startup land in general seems to run on “social proof” – the notion that I should only pay attention to you if someone credible says I should. While it’s a well known psychological phenomenon, the term “social proof” only started showing up in my World as Angel List started to take off.
It’s absolutely true that the best way to meet people professionally is through warm intros. Especially for investors who have an abundance of opportunities to look at. So, in that context, social proof is a good and valuable thing. I only invested in entrepreneurs that came through trusted channels.