The 18th Amendment and the Volstead Act were victories for the long enduring cause of Prohibition. Those two pieces of legislation banned the sale and distribution of alcohol within the United States, which inadvertently gave rise to bootleggers and organized crime as people continued to try to get their hands on alcohol during the 1920s and into the 30s before the passage of the 21st Amendment which repealed the 18th.
One technology was agricultural in the fertile Nile Valley of flooding then planting and harvesting the fields in a cyclical manner though some of the flooding may have been natural. Also, the Egyptians invented paper or papyrus which gave them a medium for writing and recording data. Also, they used the wheel and the lever and the ramp. Of course the wheel was very important for their transportation ie with chariots for example. The ramps were used for building such as the pyramids.
Answer:
Southern legislatures passed Jim Crow laws to disenfranchise and remove political and economic gains made by black people during the Reconstruction period.