Postcalssical+Americas+Intellectual


 * Intellectual- By Carter**


 * Olmecs **


 * No trade due to their isolation
 * Because of this all ideas were their own
 * Writing system
 * Mathematics
 * Calendar
 * Irrigation system


 * Mayans **


 * No trade due to their isolation
 * Because of this all ideas were their own
 * Cosmology
 * Had a writing system
 * Almost all books were burned by the Spanish
 * Created a calendar
 * Highly accurate
 * Mathematics
 * Had a symbol for zero


 * Aztecs **


 * No trade due to their isolation
 * Because of this all ideas were their own
 * Chinampas
 * “floating gardens”
 * Used for agriculture
 * Made of mud
 * Calendar
 * Education system


 * Incas **


 * No trade due to their isolation
 * Because of this all ideas were their own
 * Terrance farming
 * Food preservation
 * Freeze and dry their food
 * Quipu
 * Counting system
 * String with knots tied in it