Atheism is the denial of a god or gods, in theory or in practice. As such it has frequently been used as an accusation against ideological opponents on a point of definition. It may also be used to describe amoral behaviour. Atheism in its ultimate forms denies a spiritual aspect to man. With the discovery of scientific explanations for phenomena and with increasing materialism, disenchantment with former religious explanations has given rise to atheism among wide range of people who would debate the existence of a god as a hypothesis. This might include agnostics or adherents of nontheistic faiths such as Marxism.
Occasionally statistics from polls concerning religious beliefs are published. For example, one poll in Sweden credits 48% of the population with belief in God, and then reports that 5% of the population regularly attend church. Atheism is sometimes imputed to the ordained religious who leave their ministries, orders or churches; but it may more frequently be represented by inadequately educated and theologically prepared clergy who have no deep comprehension of their faith and in an attempt at modernism, reduce their God to a humanistic value.
The Jews and early Christians were accused of atheism by the Romans because they refused to recognize the Roman gods and the Emperor as divinities. Orthodox Christians used the accusation against various heretics, notably those who acknowledged God but denied the Trinity.