When explaining why some are gifted and others are not, nature and nurture are invariably mentioned. Is Jason gifted because of his inherited genes, his home environment, or a combination of the two? Researchers and laypersons have debated this for decades. They have conducted research, created tests, written editorials, influenced legislation,…

Theories are discussed concerning the relative significance of biological and environmental issues to giftedness, with discussion organized into the "onset" period of the late nineteenth century, with contributions by Charles Darwin, Frances Galton, and Karl Pearson; and the "flowering" period of the early twentieth century with Lewis Terman. (JDD)