How Did The Old World Change the New World

I THINK THAT THE OLD WORLD CHANGED THE NEW WORLD ALOT. THE REASON I THINK THAT IS BECAUSE IF THE OLD WORLD WOULDNT HAVE CAME TO THE NEW WORLD, WE WOULDNT HAVE SO MUCH NEW FOODS. ALSO WE WOULDNT HAVE BEEN INTRODUCED TO THE ANIMALS (LIVESTOCK). BUT AT THE SAME TIME I THINK IT WAS ALITTLE BAD THAT THEY CAME OVER HERE BECAUSE THEY BROUGHT ALOT OF DISEASES THAT KILLED THE NATIVES. THEY ALSO CAUSED ALOT OF RACISM INTHIS WORLD BECAUSE OF SO MUCH GREETYNESS. ANOTHER BAD PART ABOUT IT IS THAT THEY LET INSLAVEMENT INTO THE NEW WORLD. IN OTHER WORDS THE OLD WORLD DESTROY MANY CULTURE AND MADE NEW ONES.