Christopher Columbus - If you are an American and you enjoy marijuana, you have Chris Columbus to thank for it. Columbo brought Cannabis Sativa seeds with him on his first misguided trip to what he thought was India. In so doing, he introduced marijuana to a climate and a people who would learn to like each other very much. Bringing the gateway drug to North America was just about the only nice thing Columbus did for the natives, but it was a decision that continues to impact our lives to this day.