1. contemporary : Of the present time modern. Baseball is a contemporary sport.

2. Geographic isolation : when people are cut off from the modern world because of natural barriers like mountains, desert, jungle, ocean, ice, etc... I am not a geographic isolation person.

3. Tradition: doing things the same way for generation to generation. Christmas is a tradition i do every year.

4. Jungle is what natural barrier blocks off the Yanomami from the modern world.

5. Desert is the natural barrier that blocks off the San in the modern world.

6. Jungle is what natural barrier blocks off the Huaorani from the modern world.