[3pt14159]

I like http://slatestarcodex.com/ a kinda pessimistic leftist who sometimes calls himself a libertarian, but wrote the best takedown of libertarianism I've ever read:

http://slatestarcodex.com/2014/07/30/meditations-on-moloch/

It's what finally pushed me out of libertarianism after it was straining under my increasingly long list of qualifiers. He has a bunch of other great articles too ranging from ADHD to bayesian analysis.

[benatkin]

There's a podcast version of it. I find that it's a good way to consume it. https://www.stitcher.com/podcast/jeremiah-2/slate-star-codex

Also it's worth looking for in person Less Wrong & SSC meetups.