Boris Yeltsin was the first president of Russia.
Judaism is practiced in most areas of the world, most notably Israel and the United States which hold the largest Jewish populations. (13 to 14 million). While France has the largest European Jewish population, the United Kingdom also has a small but prominent Jewish population.
Answer: Culture difference
Explanation: I would say the main thing would be different backgrounds and culture difference
Spanish is the dominant language
Religion, manifest destiny, social gospel, social darwinism, etc. They tried to claim it was in the bible and also poor people were poor because they were uneducated and lazy and rich people were rich because they are educated and deserving of the wealth. Also the poor people needed to be "weeded" out because they were hurting our species.