Which constitutional amendment set up the current system where us senators are elected by popular vote

might be agreeing to participate ethically with other european nations in the slave trade

or notifying other european nations when taking possession   of african territories

while it was true that the cotton gin reduced the labor of removing seeds, it did not reduce the need for slaves to grow and pick the cotton.

explanation:

before eli whitney's invention of the cotton gin, picking and cleaning cotton was a slow, labor-intensive job. workers, usually slaves, had to pick the seeds from the cotton fibers by hand. this invention made it possible to grow large amounts of cotton on big farms and make money.