I wonder what possible mechanisms are possible in evolution to create large-brained intelligent creatures.
~ Roedy (1948-02-04 age:70)
- appendages for manipulating objects need ever more clever wetwear.
- camouflage. Hiding from predators means creating ever more sophisticated illusions to make the creature disappear.
- size. When you have a giant body with a brain cavity that does not get thrashed around, you have the infrastructure to grow, nourish and protect a giant brain. Contrary to urban myth, you don’t need a large brain to control a large body. In other words, the ratio of brain weight to body weight does not mean much for large animals. Consider the dinosaurs. All of a giant brain can be used for thinking or something else.
- Egalitarian social structure. Those that cannot communicate are effectively ostracised and squeezed out of the gene pool. Stratified pecking order societies reduce the pool of who communicates with whom and hence depress the evolution of intelligence.