The world is a very different set of individuals that do it so rich and interesting that we could spend a lifetime studying the behavior of individuals and their artistic and cultural expression, and yet not know anything about the human race. The different cultures that make up each society make them interesting, not only for the science or religions, like the Catholic culture or Jewish culture (which in itself marked differences that make each person has the ability to believe in different theories about life, man and world).
Each continent also has a different culture that makes it special, such as the Southern American culture, which makes their people to be warmer, with rituals that involve family and the food, that ismuch more colorful than in other parts of the world, make it easy to identify someone who lives in South America to someone in Europe or from the Canadian culture. And although been geographically belonging to another division, the Mexican culture shares much of South America, despite being more connected with the United States.
It is impossible to know all cultures, but certainly the social networks and the Internet have helped to know a little more of our neighbors.