Atheistic book of the Soviet era. So, what is atheism? In its foundation, first of all, lies the active denial of any manifestations of the supernatural in every phenomenon of nature. But not one of these. Atheism is also a fundamental denial of blind faith as the basis for any beliefs and conclusions. And not only in the question of the existence of God, but also in the attitude of man to the world in general. Atheism is an insistence on identifying the natural causes of any phenomena of nature and social life, any properties of the human person.