What are the similarities and differences between mayan aztec and incan?

wow and like how can i improve on monarch's rsvp? i can't but i can and will offer this: mayan, Incas, aztec are three separate and individual civilizations. only two of the three resided within the same area but are separated by several and possible hundreds of years. all were rather war-like and were depleted not only by the spaniard influence but by their sheer weight of their corruptness and failure to be flexible.