Do any of you really think the only difference in the "races" is just skin color?

Haiti, Zimbabwe, Rwanda, Detroit, Congo Kenya and on and on. Compared to Sweden, Norway ,(Oprah's favorite country on the earth) , ETC. Sweden and Norway has way worse weather then the African countries mentioned, so can't blame the weather I would think. How can this be, if we are exactly ALL the same? I am at a loss on this one, can only be "racism" holding the black countries back, I guess.