The Human Spark

As infants we are rife with potential. For a short time, we have before us a seemingly infinite number of developmental paths. Soon, however, we become limited to certain paths as we grow into unique products of our genetics and experience. But what factors account for the variation -- in skills, personalities, values -- that results? How do experiences shape what we bring into the world? In The Human Spark , pioneering psychologist Jerome Kagan offers an unflinching examination of personal, mor