The answer would be the anti-lynching legislation the bill was passed on 1922. the bill was heavily supported by the southern american against the african,american in the southern border. they impose the bill in order to maintain white supremacy on the southern border, hope it helps if you need help just ask me and i can help you :)
Corn accounted for the size and sophistication of the Native American civilizations in Mexico and South America by molding the Pueblo culture in terms of its technology and development. This includes the development of irrigation systems in order to water their corn fields.
