Below you can find the Lesley simpson wrote that the pre-columbian cultures of middle america existed because of this grain Jeopardy Words Answer. The answer to Lesley simpson wrote that the pre-columbian cultures of middle america existed because of this grain has 5 letters. This clue belongs to the Mexico category and is part of Jeopardy Word Level 1996. If you scroll near the bottom you will find other clues and answers part of level 1996