In greek history, the persian wars (500s & 400s bce) were caused by

The Persian Wars were caused by conflict between Greeks and Persians over settlements in Asia Minor . When Persia took control of Greek city-states in Asia minor in the 500s, they ruled more harshly than the Greeks were used to, demanding military service and greatly increasing taxes.

b) trade is easy because of the direct line between their major ports. bilateral trade reached 89,6 thousand million.

the language of nature was a manifestation from god as he said "let there be light" and there was light the world began to assume visible, comprehensible form.

what ever we know now think of the old vision of creation we can be sure that with out the speaking of word -without language- we would have no science today with its striking power to illuminate the world.