Nontheism is is a philosophical worldview and belief system that holds that there is nothing but natural things, forces, and causes

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Nontheism is a term that covers a range of both religious and nonreligious attitudes characterized by the absence of — or the rejection of — theism or any belief in a personal god or gods Invented originally as a synonym for secularism (see below), it has become an umbrella term for summarizing various distinct and even mutually exclusive positions united by a naturalist approach, such as agnosticism, skepticism, and atheism It is in use in the fields of Christian apologetics and general liberal theology

It is sometimes used synonymously with the term atheism Nontheism includes a variety of belief systems: "Strong atheism" is the positive belief that a god does not exist Someone who does not think about the existence of a deity may be termed "weakly atheistic", or more specifically implicitly atheist Other, more qualified types of nontheism are often known as agnosticism: "strong" or "positive" agnosticism is the belief that it is impossible for humans to know whether or not any deities exist

It is a more precise opinion than weak agnosticism, which is the belief that the existence or nonexistence of any deities is unknown but not necessarily unknowable Philosopher Anthony Kenny distinguishes between agnostics, who find the claim "God exists" uncertain, and theological noncognitivists, who consider all discussion of God to be meaningless Other, related, philosophical opinions about the existence of deity are ignosticism and skepticism Because of the various meanings of the term "god", a person could be an atheist in terms of certain portrayals of gods, while remaining agnostic in terms of others