You’ve probably already seen the RSA Animation of the lecture, which is fun, but the real lecture is actually a much more coherent argument. Digest it!
PS. A corollary is that the Greek crisis is just one small instance of the global crisis. There are no national solutions here: even if they did “fix” the Greek economy, the whole system is headed for a massive crash, as global growth is simply unsustainable. Do you want to save Greece? Only one way: stop talking about a “Greek crisis”!