Answer:
In 1533 CE the Inca Empire was the largest in the world. It extended
across western South America from Quito in the north to Santiago
in the south. However, the lack of integration of conquered peoples
into that empire, combined with a civil war to claim the Inca throne
and a devastating epidemic of European-brought diseases, meant
that the Incas were ripe for the taking. Francisco Pizarro arrived in
Peru with an astonishingly small force of men whose only interest
was treasure. With superior weapons and tactics, and valuable
assistance from locals keen to rebel, the Spanish swept away the
Incas in little more than a generation. The arrival of the visitors to
the New World and consequent collapse of the Inca Empire was the
greatest humanitarian disaster to ever befall the Americas.
Step-by-step explanation: