Explanation:

Ajivika is one of the nastika or "heterodox" schools of Indian philosophy. Purportedly founded in the 5th century BCE by Makkhali Gosala, it was a srama?a movement and a major rival of early Buddhism and Jainism. Ajivikas were organised renunciates who formed discrete communities.
The Ajivika school is known for its Niyati doctrine of absolute determinism, the premise that there is no free will, that everything that has happened, is happening and will happen is entirely preordained and a function of cosmic principles. Ajivika considered the karma doctrine as a fallacy. Ajivika metaphysics included a theory of atoms similar to the Vaisheshika school, where everything was composed of atoms, qualities emerged from aggregates of atoms, but the aggregation and nature of these atoms was predetermined by cosmic forces. Ajivikas were atheists and rejected the authority of the Vedas, but they believed that in every living being is an atman – a central premise of Hinduism and Jainism.