In this paper I will be critically discussing the idea that all behaviour is learnt. But first let me introduce you to the precise definition of behaviour.
What is behaviour?
"Behaviour is the aggregate of all the responses made by an organism in any situation. It is the range of actions and mannerisms made by organisms, systems, or artificial entities in conjunction with their environment, which includes the other systems or organisms around as well as the physical environment. It is the response of the system or organism to various stimuli or inputs, whether internal or external, conscious or subconscious, overt or covert, and voluntary or involuntary. It is influenced by culture, attitudes, emotions, values, ethics, authority, rapport, hypnosis, persuasion, coercion and/or genetics."
-wikipedia.org
It can be defined more precisely as an internally directed system of adaptive activities that facilitate survival and reproduction.Any behavior we can observe by watching an animal is overt behavior. In humans, behavior is controlled primarily by the endocrine system and the nervous system. Generally, complex nervous systems exhibit a greater capacity to learn new responses and thus more adjustment in behavior.
In general, overt behavior may be classified as innate or learnt. Many people use the term "instinctive behavior" as a synonym for innate behavior. Although both termss refer to natural, inborn patterns of behavior. Another category of behaviour which was later on added is complex behaviour which is a blend of innate and learned components.
Innate behaviour
Innate behaviour is defined as a relatively complex response pattern which is usually present in both sexes of a given species. These responses are said to have a genetic basis and are essentially unlearned and adaptive. eg. Aggression
Learnt behaviour
If organisms only had innate behaviour then all the organisms of same species would have had