I’m pretty sure it changed because he was the first person ever to run for president that wasn’t a politician or founding father. He was just a wealthy guy. Fun Fact: That is why Trump has his painting in the Oval Office an not because of the things he did to the native americans.
There was a well developed and a highly efficient system of water management from the village level upwards in 900-1270 AD.The water tanks which came up during Chola Dynasty were too many but one stand out.Rajendra Chola built a huge tank named Solagangam in his capital city Gangaikonda Solapuram and was described as the liquid pillar of victory.About 16 miles long, it was provided with sluices and canals for irrigating the lands in the neighbouring areas.Another very large lake of this period, which even today seems an important source of irrigation was the Viranameri near Kattumannarkoil in South Arcot district founded by Parantaka Chola. Other famous lakes of this period are Madurantakam, Sundra-cholapereri, Kundavai-Pereri (after a Chola queen).
The belief which has been used in the past to describe that United States should control and will control all or most of North America was called Manifest destinty - this was a doctrine which basically talked about how Americans will justifiably conquer all of the North American continent.