The Moon.

Czech Republic. We have religion trust issues since the medival era when we were against the opressing and corrupt christian church. Communists endorsed it and nowadays we are one of the least religious country in the world. We are in the heart of Europe, living standarts are pretty good and we are also one of the safest country. Feel free to move in!

My part of Delaware is pretty good

Probably anywhere in Europe, China, Cuba, or North Korea.

Geographically in the United States, here is the map of religiosity of states. The darker the blue, higher the religiosity. That should tell us that the light blue states are fertile grounds for progressives and atheists. [en.wikipedia.org]

Internationally, the North European progressive countries are more non-religious such as Norway, Sweden, Denmark etc. No wonder they have done better for their societies.

Atheism is very new and it is going to be 400 years fight to eradicate the disease of Christianity alone.

In your own head and working it out for yourself