Instinct Theory
This video presents the same text shown beside it, spoken and on screen. It adds nothing the text does not say.
State
Instinct theory holds that behavior is driven by innate, species-typical patterns that require no learning.
Show
Infants root and suck without instruction, and birds of a species build the same nest structure.
Watch for
Naming an instinct explains nothing by itself. The theory faded because the list grew without gaining predictions.