By a long, slow subconscious process of trial and error learning, society acquires experience of how to survive, accomplish, grow and develop. Over long periods the subconscious learning from experience gets distilled into conscious Knowledge that can be passed on from one generation to another as skill, knowledge and values. Skills and knowledge relating to the environment, plants, animals, hunting, agriculture, tool making, metal working, food preparation, health, warfare, construction, the arts, weather, the seasons, technology and countless other subjects are codified and communicated orally or in writing from elders to youth through family, apprenticeships, and various forms of training and education. Thus, humanity's capacity for accomplishment grows from generation to generation.