Buddhism [Dharmic, 600 BC] 376 million adherents [Wikipedia | Britannica | Beliefnet]

Buddhism is also known as Buddha Dharma or Dhamma, which means roughly the “teachings of the Awakened One” in Sanskrit and Pali, languages of ancient Buddhist texts. Buddhism was founded around the fifth century BCE by Siddhartha Gautama – most commonly referred to as The Buddha. In Buddhism, any person who has awakened from the “sleep of ignorance” (by directly realizing the true nature of reality), without instruction, and teaches it to others is called a buddha. All traditional Buddhists agree that Shakyamuni or Gotama Buddha was not the only Buddha: it is generally taught that there have been many past Buddhas and that there will be future Buddhas too.
While there are now many sects of Buddhism, they all hold to four fundamental points: 1, All accept the Buddha as their teacher; 2, all accept the Middle Way (non-extremism), Dependant Origination, the Four Noble Truths, and the Noble Eightfold Path; 3, all accept that both monks and the laity can pursue the path to englightenment; and 4, all consider Buddahood to be the highest attainment.