What financial problem contributed to the end of the Roman Republic?

Enslaved laborers wanted to be paid, and landowners did not agree to this.
Small farms failed due to bad harvests, which caused workers to lose their jobs.
Military spending created too much debt and forced spending cuts in other areas.
Unemployment grew as landowners replaced paid workers with enslaved laborers.

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."

copernicus finished the first manuscript of his book, "de revolutionibus orbium coelestium" ("on the revolutions of the heavenly spheres") in 1532. in it, copernicus established that the planets orbited the sun rather than the earth. he laid out his model of the solar system and the path of the planets.