Did the Dravidians come to the Indus Valley before or after the others in the area?

Which of the selections below was one pager outcomes of shays rebellion in 1786 in 1787

Historians are concerned with the accuracy of their writings and readings but are also aware of the inability of authors to know every angle of every story biases, perspectives, beliefs, and a variety of other differences history being told by one person at a time no one being totally accurate, as hard as we try really need on this, and you^^

Oque provoca coroço no peito do homen?