What were some of the negative outcomes of journeys to the new world in the Renaissance?

Who called for proletarian revolution to overthrow the bourgeoisie and establish a classless society? What will our era of time be called? How did the French Revolution influence sociology? What did poor girls wear in the Victorian times? What would happen if there were no women in the world? How did social change in Europe contribute to European expansion overseas? What do you call the lucky red envelope in Chinese? How long has china been a country? What was name of the continents when they were all connected? How did people hear about the outbreak of World War 2? How did Leif Ericsson exploration benefit the world? Why do we still remember Sieur la Salle the explorer today? What was Cote d ' Ivoire formally called? What is a morotal? What was the city of St. Petersburg called from 1925 up until 1991? Who conquered the Russian states in the early AD 1200s? Which of these forms of organization begins with the least important point or illustration and ends with the most important? How much of the world's land do settlements occupy? What were some of Rosalind Franklin's major world events? How could the small European countries control the large countries in other continents?

What were some of the negative outcomes of journeys to the new world in the Renaissance?