Just thought I would point out that the slave trade is not considered part of the Columbian Exchange. The Columbian exchange, also known as the great biological exchange, dealt with plants, animals, and pathogens. See for example, Alfred Crosby, ''The Columbian Exchange'' (1972) | Just thought I would point out that the slave trade is not considered part of the Columbian Exchange. The Columbian exchange, also known as the great biological exchange, dealt with plants, animals, and pathogens. See for example, Alfred Crosby, ''The Columbian Exchange'' (1972) |