How were the borders between Pakistan and India decided on? Who created them? What were the effects of these borders?

To comapre in north america racial view of all inhabitatnts was developing through centuries toe xplode in early 19th century latin america on the other hand was that focus on that matter and all inhabitants like for example europeans and natives started a mixed marriges and many view themsleves as metiso in latin america there was not important role of racial ideologies