Animal genetic resources for food and agriculture crop and livestock species in the early neolithic time period changed our human evolution and lifestyles. This ability to control food production led to major demographic, technological, political and military changes. Consecutively, thousands of years of natural and human selection, genetic drift, inbreeding, and crossbreeding have contributed to the diversification of animal genetic resources and increased the variety of environments and production systems that livestock keeping takes place. Relatively few species have been domesticated; out of the world's 148 non-carnivorous species weighing more than 45 kg, only 15 have been successfully domesticated. The proportion of domesticated birds used for food
Names for the human species "animal capable of rationality", a term used in medieval scholasticism (with reference to Aristotle), and also used by e.g. Carl von Linné 1760, Immanuel Kant 1798. Based on the same pattern is "animal sociale" or "social animal" "animal laborans" "laboring animal" (Hannah Arendt 1958) and "animal symbolicum" "symbolizing animal" (Ernst Cassirer 1944). The binomial name "Homo sapiens" was coined by Carl Linnaeus (1758). Names for other human species were introduced beginning in the second half of the 19th century ("Homo neanderthalensis" 1864, "Homo erectus" 1892). There is no consensus on the taxonomic delineation between human species, human subspecies and the