Atheism is defined as the belief that there is no God or gods. ‘What is atheism?’ aims to provide a positive view of atheism, one which does not make the mistake of thinking that atheism can only exist as a parasitic rival to theism, or that atheism is essentially negative about a whole range of beliefs other than those concerning God's existence. Atheists can be indifferent rather than hostile to religious belief. They can be more sensitive to aesthetic experience, more moral, or more attuned to natural beauty than many theists. There is no more reason for them to be pessimistic or depressive than there is for the religious to be so.