Xenophobia

Xenophobia is defined as the "hatred or fear of foreigners or strangers or of their politics or culture". It comes from the Greek words ξένος (xenos), meaning "stranger," "foreigner" and φόβος (phobos), meaning "fear."

Xenophobia can manifest itself in many ways involving the relations and perceptions of an ingroup towards an outgroup, including a fear of losing identity, suspicion of its activities, aggression, and desire to eliminate its presence to secure a presumed purity. Xenophobia can also be exhibited in the form of an "uncritical exaltation of another culture" in which a culture is ascribed "an unreal, stereotyped and exotic quality".

Before I explain about so called 'racism' first here are a few facts. You are all from the same gene pool!

Human skin color is primarily due to melanin; it ranges from skin almost black in appearance to white with a pinkish tinge due to blood vessels underneath. Variations in skin color are mainly of genetic origin and are associated with sunlight. They are adaptations to sunlight intensities which produce vitamin D deficiency or ultraviolet light damage to folic acid. This also includes protection from ambient temperature, infections, skin cancer or frostbite, an alteration in food, and sexual selection. Natural human skin color diversity is highest in black or Sub-Saharan African populations.

Social relations have a significant impact on the perception of skin color. In traditional African society, light skin was often seen as unhealthy, and there was no overall preference for it. When people were of a similar ethnic background and were not exposed to intense sunlight, the main difference in skin color was the slight one between men and women which led to the old European stereotype of the "fair sex" and the "tall, dark, and handsome man".

In a nutshell, it's God's fault! Although she (yes SHE) acted with the best possible intentions, her attempts to give you monkeys an evolutionary hand up sadly backfired. God's gravest error

All that said, there is no such thing as racism! Colour, creed, sexuality even, are just excuses for the real problem GREED!

Humans are basically nomadic by nature but after Gods interference humans settled and rival city states began to spring up. Then one group decided they liked the look of the others settlement better and hey presto war was born. So don't blame racism for social problems its just greed, always has been and always will be.