How does regional differences affect national politics today?

what the first or next guy says

2686-2181 bce-- "egyptian civilization developed along the nile river in large part because the river’s annual flooding ensured reliable, rich soil for growing crops."

1069-664 bce-- "ancient egyptians developed wide-reaching trade networks along the nile, in the red sea, and in the near east."

equal area projections

equal-area projection. a projection in which regions on the earth's surface that are of equal area are represented as equal.