This will be about cotton gins.
Eli Whitney invented the cotton gin.
It took a lot less time to take out the seeds with the cotton gin than it did with hand.
A cotton gin is a machine that quickly and easily separates cotton fibers from their seeds, allowing for much greater productivity than manual cotton separation.
The cotton gin made lives easier because it separated the seeds from the cotton much faster and made people in the south live better because they can use the slaves used to get the seeds out before more field work. The cotton gin didn't cause any problems then or now.