Farmers markets overflow with exotic shapes and colors.
From the pages of small catalogs sprout seeds with names like Rainbow Inca corn, Appaloosa beans, Red Alpine fraises des bois, Zapotec pleated tomatoes. The Irish potato famine of the 1840s perfectly illustrates the implications of a dwindling bio-gene pool. In a classic case of putting all its eggs in one basket, Ireland had planted its meager soil with a single variety of potato. Replicating a single set of genes, this was monocropping on a disastrous scale, When a virus came along to which these genes were susceptible, there were no alternative potato crops remaining to feed the country. And those who couldn't emigrate starved to death.