Eben Moglen is a professor of law. He is also a advocate for privacy.
I came across his famous "Freedom in the Cloud" talk 2010 where he talked about the need for a decentralized internet. An internet, where we all keep our data in our own control.
He founded the FreedomBox project which aims to provide an easy-to-use privacy-aware device that holds our data and connects to other people's FreedomBoxes (or browsers).
His inspiring talk impressed my very much: