How did christopher columbus impact our world

Christopher Columbus impacted our world because the queen believed the world was flat yet Christopher Columbus said it was round , so he went on a trip with some fellow people , that's when Christopher Columbus found our land and finally convinced the queen the earth was round.And that's why he has his own day named after him Columbus day, because of the storms he and the fellow unknown people on the boat went through risking there lives not knowing how long the journey would be and if they had enough food if the could drink the water what the weather would be like.Just to prove a point , and finding our land. And that's the story of Christopher Columbus. (Hope this helps good luck)