Humans as hunter/gatherers: up to about 10,000 years ago (ya) Hunting for subsistence: fish, bird"s eggs, small mammals, scavenging, collecting native plants. Humans traveled in small clans or tribes, lifestyle was nomadic, migratory, following the available food supplies. Widespread transition from migratory and nomadic communities to settlements with agricultural regions. Early domestication of animals for work and food. Early forms of breeding experiments on native plants and animals to derive greater outcomes (bigger eggs, more output) The second agricultural revolution: mid-17th to late 19th centuries increase in agricultural production in britain and europe due to improvements in technology and methods that increased labor and land productivity. The industrial revolution: 1760 - 1900 began in england in europe and rapidly expanded to north america, agricultural societies became more industrialized, agriculture was able to keep up with increased human need for food. In the 1500s fur trappers captured land-based mammals for their furs and meat.