In philosophy, atheo-philosophy (LH:#), from a- "not" + theos- "god or sun god" + philo- "love" + -sophia "wisdom", aka "atheistic philosophy" (Cudworth, 1678), “atheism philosophy”, or "philosophical atheism", refers to a philosophical system or view rooted in explicit atheism, i.e. a philosophy themed on or around denial of the existence of god, gods, or "theos", i.e. heat, sun, or energy as god.
Historically, about two dozen or so shades or varieties of atheo-philosophies have arisen, from the ancient four element materialism philosophies of Charvaka (600BC) and Empedocles (450BC), to atomic atheistic philosophy, e.g. Epicureanism (Epicurus, 300BC), to modern materialism philosophies, e.g. Holbach (1770) or Buchner (1855), to newer brands such as: utilitarianism (Mill, 1861), Freudianism (Freud, 1927), objectivism (Rand, 1957), Dawkinsianism (Dawkins, 2006), Harrisianism (Harris, 2010). Among these, only the 1957 “objectivism” philosophy promoted by Ayn Rand, aka "Randian atheophilosophy of selfishness" (Byrd, 2015), seems to have come to be called, specifically, an atheo-philosophy (the conjunction form of atheism philosophy).
The following are quotes:
- “Anaximander was the chief of the old atheistic philosophers.”
- “The next task, after lifting the veneer of necessity from Kantian reason and from other theologies and philosophies too, is to pursue, where possible, relations of agonistic respect with Kantians, neo-Kantians, Buddhists, Hindus, and supporters of the three monotheisms who either come to ac-knowledge without deep resentment the relational contestability of their own theo-philosophies or atheo-philosophies or do a hell of a lot better than any has …”
- — William Connolly (2013), The Fragility of Things (pg. 138) 
- “What's more, the result of her embrace of atheism was not simply to reject and for-get religion as a phenomenon, but, as stated before, she actively committed herself to its destruction—a lifelong commitment to drag humanity out of its irrational religious lifeworld and bring it into intellectual maturity, which she identified as Aristotelian logic. She indeed became its sworn enemy as her atheo-philosophy became the legitimation for many anti-religious political sentiments and arguments. She found no value in a religious life, especially if it was dedicated to a divine being that didn't exist, service to lesser peoples who didn't deserve it, or self-sacrifice for a supposed "greater good" that was not greater. Religion in her view was evil for pushing the good of the whole above the good of the individual. The most wicked was the one who sacrificed himself/herself for both the divine and the masses—to be a religious martyr in the cause of social justice is the ultimate sin in the Randian atheophilosophy of selfishness.”
- — Dustin Byrd (2015), A Critique of Ayn Rand’s Philosophy of Religion 
- God theory – Hmolpedia 2020.
- Philosophical Atheism – Facebook.
- Explicit atheism – Hmolpedia 2020.
- Atheism types by denial and belief – Hmolpedia 2020.
- Cudworth, Ralph> (1678). The True Intellectual System of the Universe, Volume One (pg. 156). Publisher.
- Connolly, William. (2013). The Fragility of Things: Self-Organizing Processes, Neoliberal Fantasies, and Democratic Activism (pg. 138). Duke
- Byrd, Dustin. (2015). A Critique of Ayn Rand’s Philosophy of Religion: the Gospel According to John Galt (pg. 19). Lexington.
- Theosophy – Wikipedia.