By terrace farming.
It is very likely that many people did not survive surgery during Inca times. It is difficult to determine those outcomes, however.
Well, the Inca's did not survive they all died because of Pizarro. Atahualpa died from accepting Christianity so he didn't get burned alive, only to get strangled.
Machu Picchu.
Most of the Incas people didnt survive infact the last king of the Incas nation was killed by the spanish in 1572.
The Inca agriculture was basically living off the land, and using the environment surround them to give them the supplies that they needed to survive.
'Ancient Astronaut' theorists believe that it is quite possible that the Inca -as a race- exited this planet for another, and still exist... elsewhere; unknown.
The Sapa Inca or Inka
The Sapa Inca was on the top of the Inca society.
He decided that the Inca's needed help, so the Inca King wanted to to rule to help out.
Amautas, were the tutors to the Inca nobility
there was no topa inca
The Sapa Inca is the highest rank in the Inca class structure. Also known as the emperor the Incan civilization.