Evaluate the positive and negative effects of the Columbian Exchange between Afro-Eurasia, the Americas, and the Caribbean between 1450-1900.

i do agree with robert moses’ statements about wiping out cities that are an “impediment to new growth”. in order to have a positive community, the city must continue to grow either in terms of size or economics. therefore wiping out cities that restrict growth benefits the overall society and all the people living in it. similar to a social contract, i believe that if a person was to live in a community they must sacrifice some of their rights, in this case property, for the overall good of the people. as long as these people living in the cities are reimbursed and the purpose of wiping out the cities is to serve the public, there is no problem with robert moses’ core idea.

it would take 95 years for that supernova to be visible on earth, so the year would be about 2113. i hope i did my calculation right.