Though the Olmecs (1250-200 bc) were the first civilization in Mexico, the Aztecs (1325-1521) -Mesoamerica's last imperial civilization and the most significant of the militaristic post-Classic period - are probably who first come to mind when we think of great empires of that region. Like other Mesoamerican cultures, Aztec gods and myths reflected a natural philosophy where ideas concerning life and death were linked symbolically to the earth, sky...