Rationalist Tumblr discusses politics and culture, but it is definitely not hard to find; the quality of discussion may be higher than the Tumblr average but probably not what you are looking for. On the plus side, most of us have different usernames there, so you can consider ideas apart from author until you re-learn everyone. Which happens pretty quickly, so not a big plus.
The Tumblr folks seem to mostly agree that Tumblr is not the optimal solution for this, but it has the advantage of currently existing.
Rationalist Tumblr discusses politics and culture, but it is definitely not hard to find; the quality of discussion may be higher than the Tumblr average but probably not what you are looking for. On the plus side, most of us have different usernames there, so you can consider ideas apart from author until you re-learn everyone. Which happens pretty quickly, so not a big plus.
The Tumblr folks seem to mostly agree that Tumblr is not the optimal solution for this, but it has the advantage of currently existing.
The problem is that to contribute to that I would have to follow like 50 tumblrs and try to convince people to follow me as well