Discrimination against atheists

Discrimination against atheists, sometimes called atheophobia, atheistophobia, or anti-atheism, both at present and historically, includes persecution of and discrimination against people who are identified as atheists. Discrimination against atheists may be manifested by negative attitudes, prejudice, hostility, hatred, fear, or intolerance towards atheists and atheism or even the complete denial of atheists' existence. It is often expressed in distrust regardless of its manifestation. Perceived atheist prevalence seems to be correlated with reduction in prejudice. There is global prevalence of mistrust in moral perceptions of atheists found in even secular countries and among atheists.

Because atheism can be defined in various ways, those discriminated against or persecuted on the grounds of being atheists might not have been considered atheists in a different time or place. Thirteen Muslim countries officially punish atheism or apostasy by death and Humanists International asserts that "the overwhelming majority" of the 193 member states of the United Nations "at best discriminate against citizens who have no belief in a god and at worst can jail them for offences dubbed blasphemy". It has been argued that the most intense persecutions of atheists such as executions and killings may amount to genocide under the legal definition.

Ancient times

Tim Whitmarsh argues atheism existed in the ancient world, though it remains difficult to assess its extent given that atheists are referenced (usually disparagingly) rather than having surviving writings. Given monotheism at the time was a minority view, atheism generally attacked polytheistic beliefs and associated practices in references found.