What are the reasons the Aztec and Incas were declined?

Who was the first person to use fire? What was Cleopatra's mum called? How long could ancient Rome leaders serve for? What else was happening in history when Hestia was famous? When was the old houses of Parliament built? How long did abel live? What are some Chinese contributions to civilization? How did the Phoenician alphabet spread throughout the ancient world? How was the roman culture changed by contact with the Hellenistic of Greece? Mountains east of Rome? How did ancient Romans feel about slavery? What civilization had a cyclical view of history? Which nation was the most powerful at the beginning of the age of absolutism? Why Greek god Athena is the best goddess? What time period did the nomads live? Who is Hecate in Greek Mythology? What is the setting in the story of sappia the goddess? Who were arteimis's family members? What did the Inca write in? Who owned the Inca land?