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Enslaved labor contributed to the foundation of wealth for the colonies because they had more helping hands on farms with cotton and other cash crops, and they had more people to put to work in factories and such.
Western democracies had always been hostile to the idea of a communist state. The United States had refused recognition to the USSR for 16 years after the Bolshevik takeover. I hope my answer has come to your help. God bless and have a nice day ahead!
Those who had said that the earth was round were the Greek philosopher Eratosthenes, Posidonius and the Arab Caliph El Ma'mun. Then in the 15th century the roundness of the Earth was already fully accepted by the geographers of the time.
Columbus designed his trip using the calculations of a Greek sage who lived 17 centuries before. His name was Eratosthenes and he deduced at that time that the Earth was a sphere, and even measured its diameter by making calculations from the projection of shadows in different latitudes of the world. Columbus proposed to get from Europe to the east coast of Asia by a shorter route, traveling in the west, a revolutionary idea for a time when security was sailing with the African coast in sight. Columbus left with his 3 caravels and on the way discovered that the doctors had more reason than their optimistic calculations. Therefore, his crew was about to mutiny because the trip was longer than promised. Columbus never reached Asia, but halfway there he found a new continent and this coincidence saved his life and earned him a place in history.
Mache tou Marathonos was the famous greek.