Also, in the realm of morality, everything atheism purports to be true is completely optional. We can all agree that murder is wrong, but what's to stop an independent person from asking the logical question "who says?". Objectively, why is murder wrong? Societies are very delicate things, and it does not take much to spin them out of control. When chaos rises, people will trade their freedoms for order, and there will be guns in the street. Just look at the rise and fall of the Roman Empire.
Have a look at the series "How Should We Then Live?" by the late Dr. Francis Schaeffer. His insights into art, music, and architecture being a reflector and record of history is fascinating. https://www.youtube.com/watch?v=Z0Hr0RLHxnI&list=PLl7doUcMOr...
So people may very well give up their beliefs, for a time, but then the pendulum will swing back the other way hard, and societies will be grasping at some other explanation to answer those basic questions: who am I? why am I here? where am I going?
This is all very well trodden territory. People chase their tails their entire lives trying to live without God, and end up being right back where they started at the end of their lives, just like Bertrand Russell did.