Social Learning and Cumulative Cultural Evolution
In DIT, the evolution of culture is dependent on the evolution of social learning. Analytic models show that social learning becomes evolutionarily beneficial when the environment changes with enough frequency that genetic inheritance can not track the changes, but not fast enough that individual learning is more efficient. While other species have social learning, and thus some level of culture, only humans, some birds and chimpanzees are known to have cumulative culture. Boyd and Richerson argue that the evolution of cumulative culture depends on observational learning and is uncommon in other species because it is ineffective when it is rare in a population. They propose that the environmental changes occurring in the Pleistocene may have provided the right environmental conditions. Michael Tomasello argues that cumulative cultural evolution results from a "ratchet effect" that began when humans developed the cognitive architecture to understand others as mental agents. Furthermore Tomasello proposed in the 80s that there are some disparities between the observational learning mechanisms found in humans and great apes - which go some way to explain the observable difference between great ape traditions and human types of culture (see Emulation (observational learning)).
Read more about this topic: Dual Inheritance Theory
Famous quotes containing the words social, learning, cumulative, cultural and/or evolution:
“Are we talking about a church founded by the Son of God made man? Or are we talking about simply a social gathering that we can rebuild as we wish?”
—Donna Steichen, U.S. opponent of women in the ministry. As quoted in Time magazine, p. 54 (November 23, 1992)
“The most heterogeneous ideas are yoked by violence together; nature and art are ransacked for illustrations, comparisons, and allusions; their learning instructs, and their subtlety surprises; but the reader commonly thinks his improvement dearly bought and, though he sometimes admires, is seldom pleased.”
—Samuel Johnson (1709–1784)
“Raising children is an incredibly hard and risky business in which no cumulative wisdom is gained: each generation repeats the mistakes the previous one made.”
—Bill Cosby (20th century)
“Unfortunately there is still a cultural stereotype that it’s all right for girls to be affectionate but that once boys reach six or seven, they no longer need so much hugging and kissing. What this does is dissuade boys from expressing their natural feelings of tenderness and affection. It is important that we act affectionately with our sons as well as our daughters.”
—Stephanie Martson (20th century)
“Like Freud, Jung believes that the human mind contains archaic remnants, residues of the long history and evolution of mankind. In the unconscious, primordial “universally human images” lie dormant. Those primordial images are the most ancient, universal and “deep” thoughts of mankind. Since they embody feelings as much as thought, they are properly “thought feelings.” Where Freud postulates a mass psyche, Jung postulates a collective psyche.”
—Patrick Mullahy (b. 1912)