*Social brain hypothesis
*Brain is evolved due to increase in size. Mental states exist in relation to
some material happenings, but causally are completely irrelevant. Behaviour
is caused by muscles that contract upon receiving neural impulses, and neural
impulses are generated by input from other neurons or from sense organs.
In general, materialist theories are those subscribing to the
statement that mental events can have no effective action on the brain
events in World 1— that World 1 is closed to any conceivable outside
influence such as is postulated in dualist-interactionism. The term
LIAISON is used for both intention and perception, particularly in
*Environmental conditions bounds the brain for
evolution. Here to be considered two types of
Folivorous- Leaf consumers.
Frugivorous- Fruit consumers.
*Fruit consumers are more likely to be having more
developed brain in terms of (a) Overall size of brain,
(b) Relative size & (c) Brain’s tendency to use