That the color of our skin is nothing more than the interesting distribution of melanin is well illustrated in this article about black and white twins  http://www.dailymail.co.uk/news/article-2123050/Look-The-black-white-twins-turn-seven.html

Race is irrelevant within this family, as it is in all families.  If it weren’t for our history of racism, would we even need the concept of “race”? I thank the friend who forwarded this timely link.