Why are white europeans the only group of people on the planet earth that evolved to be physically diverse?

>Africans
black hair, brown eyes
>Asians
black hair, brown eyes
>Native americans
black hair, brown eyes
>Native Australians
black hair, brown eyes

>Native Europeans
black hair, blonde hair, red hair, brown hair
brown eyes, blue eyes, grey eyes, green eyes, hazel eyes

Why are europeans the only group that developed like this?