I thought that was already the case!?

So let's throw that old axe away, it is time to realise that we are all the same race, no matter of skin, hair or eye color.

Thare are many factors affecting how we develop as humans, but the change is very slow and takes many generations, maybe hundreds of generations to actually be visable.
Anyhow, we are all the same but have adopted to different climate, culture, social needs and other environmental properties.

People that are developed in very sunny and hot areas tend to get dark skin, those that develop in colder areas like far north or far south tend to get lighter skin. But this is not race, this is adaption.