They both link to Hinduism & are both known as some kind of spiritual leader or someone to look up to.Both a guru & an avatar are viewed as embodying the concepts of pantheism and polytheism.<span />
"With malice towards none, with charity for all."
They bred prolifically and when their population exceeded the capacity of their limited land to sustain them, they sent out the surplus population to seize new land and establish new city-states. So they spread right around the Mediterranean and Black Seas.