This is a sequence curated by Paul Christiano on one current approach to alignment: Iterated Amplification.
The first part of this sequence clarifies the problem that iterated amplification is trying to solve, which is both narrower and broader than you might expect.
The second part of the sequence outlines the basic intuitions that motivate iterated amplification. I think that these intuitions may be more important than the scheme itself, but they are considerably more informal.
The core of the sequence is the third section. Benign model-free RL describes iterated amplification, as a general outline into which we can substitute arbitrary algorithms for reward learning, amplification, and robustness. The first four posts all describe variants of this idea from different perspectives, and if you find that one of those descriptions is clearest for you then I recommend focusing on that one and skimming the others.
What needs doing
The fourth part of the sequence describes some of the black boxes in iterated amplification and discusses what we would need to do to fill in those boxes. I think these are some of the most important open questions in AI alignment.
The fifth section of the sequence breaks down some of these problems further and describes some possible approaches.