Rupert Sheldrake's theory of morphic resonance challenges the fundamental assumptions of modern science. An accomplished biologist, Sheldrake proposes that all natural systems, from crystals to human society, inherit a collective memory that influences their form and behavior. Rather than being ruled by fixed laws, nature is essentially habitual. <em>The Presence of the Past</em> lays out the evidence for Sheldrake's controversial theory, exploring its implications in the fields of biology, physics, psychology, and sociology. At the same time, Sheldrake delivers a stinging critique of conventional scientific thinking. In place of the mechanistic, neo-Darwinian worldview he offers a new understanding of life, matter, and mind.