The Orphic Greeks of the sixth century B. C. held that history began when Chronos (time) gave birth to the twin forces of divine Aether and dark Chaos. The similarity between this theory and Zurvanism could NOT have resulted from the influence of:

The Orphic Greeks on Zoroaster.

Explanation:

Zoroaster "lived between about 1400 and 1200 B.C.", at least six centuries before the Orphic Greeks, so he cannot have been influenced by them. Don't forget BC is backwards and it got tomes wrong.

Zoroaster was the founder of the Zoroastrian religion, was an Iranian who lived between about 1200 and 1400 B.C. (Before); and Zoroastrian converts of the sixth century B.C. (after)

the social historical theory explains the creation of the varnas, jats and of the untouchables. according to this theory, the caste system began with the arrival of the aryans in india. the aryans arrived in india around 1500 bc. the fair skinned aryans arrived in india from south europe and north asia.

there were abundant sources of fuel nearby