European Carried Alien Diseases as Smallpox And Influenza Which Wiped Out Capac.

The Inca Empire was a kingdom that developed in the Andes region of South America and gradually grew larger through the military strength and diplomacy of their emperors. Known as Tawantinsuyu, the Inca state spanned the distance of some 2,500 miles, from northern Ecuador to central Chile, and at its peak consisted of 12 million inhabitants from more than 100 different ethnic groups. Well-devised agricultural and roadway systems, along with a centralized religion and language, helped maintain a cohesive state. Despite their power, the Inca were quickly overwhelmed by the diseases and superior weaponry of Spanish invaders, and the last bastion of their immense empire was overtaken in 1572.

Inca Religion

The Inca religion centered on a pantheon of gods that included Inti; a creator god named Viracocha; and Apu Illapu, the rain god. Impressive shrines were built throughout the kingdom, including a massive Sun Temple in Cusco that measured more than 1,200 feet in circumference.

Powerful priests depended on divination to diagnose illness, solve crimes and predict the outcomes of warfare, in many cases requiring animal sacrifice. The mummified remains of previous emperors were also treated as sacred figures and paraded around at ceremonies with their stores of gold and silver.

Despite these advances, the arrival of Spanish explorers in the 1500s soon set into motion the events that would lead to the collapse of the Inca Empire. The Spanish carried such alien diseases as smallpox and influenza, which wiped out a huge chunk of the population before killing Huayna Capac and his chosen successor around 1525. 

Those two deaths sparked a civil war as would-be emperors battled for power, with Atahualpa eventually outlasting his half-brother, Huascar, to grab the throne of the now-weakened empire.