Judging from the reinstatement of the Church in Russia, it seems the atheists had only temporary control. In China there is a large population of theists, although the godless communists still have power. The Buddhists, I don't know, except their cosmology doesn't seem to involve a Creator.
Buddhists are agnostic on the matter of reincarnation or an afterlife. They're mostly dedicated to living a balanced life here on Earth.