Pinckney's Treaty with Spain finally solved the problem of:

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."

they thoght they were going to nuke each other

warfare was the primary means of cultural transmission in both regions.