I am an atheist and consider The Law of One plausible

[xise]

I think you can be an atheist in general for a given definition of atheism and easily believe in the Law of One, or be an atheist and believe in Buddhism or many other spiritual or religious practices. I haven't studied atheism, but assuming wikipedia is reliable:

From Wikipedia's Atheism Page:

Atheism is accepted within some religious and spiritual belief systems, including Hinduism, Jainism, Buddhism, Raelism, Neopagan movements[19] such as Wicca,[20] and nontheistic religions. Jainism and some forms of Buddhism do not advocate belief in gods,[21] whereas Hinduism holds atheism to be valid, but some schools view the path of an atheist to be difficult to follow in matters of spirituality.[22]


...

Atheistic schools are found in early Indian thought and have existed from the times of the historical Vedic religion.[130] Among the six orthodox schools of Hindu philosophy, Samkhya, the oldest philosophical school of thought, does not accept God, and the early Mimamsa also rejected the notion of God.[131] The thoroughly materialistic and anti-theistic philosophical Cārvāka (also called Nastika or Lokaiata) school that originated in India around the 6th century BCE is probably the most explicitly atheistic school of philosophy in India, similar to the Greek Cyrenaic school. This branch of Indian philosophy is classified as heterodox due to its rejection of the authority of Vedas and hence is not considered part of the six orthodox schools of Hinduism, but it is noteworthy as evidence of a materialistic movement within Hinduism.[132] Chatterjee and Datta explain that our understanding of Cārvāka philosophy is fragmentary, based largely on criticism of the ideas by other schools, and that it is not a living tradition:

"Though materialism in some form or other has always been present in India, and occasional references are found in the Vedas, the Buddhistic literature, the Epics, as well as in the later philosophical works we do not find any systematic work on materialism, nor any organized school of followers as the other philosophical schools possess. But almost every work of the other schools states, for refutation, the materialistic views. Our knowledge of Indian materialism is chiefly based on these."[133]

Other Indian philosophies generally regarded as atheistic include Classical Samkhya and Purva Mimamsa. The rejection of a personal creator God is also seen in Jainism and Buddhism in India.[134]