René Descartes' Theory of Ideas has helped shape our entire world of thought as it applies to all subjects. Although it may seem like too much to talk about every topic, it is not. Whether science, literature, or fine art, all of these meditations require some degree of reflection. People think all day; they are constantly and unknowingly solving problems, analyzing, detecting, observing, questioning, wondering and feeling; Yet they rarely question their ability to do so or the origins of their knowledge. In his studies, Descartes sought to discover the origin of these thoughts and abilities. Is the information in our head learned or have we had it all along and just remember it? Why do all animals, including humans, acquire a specific set of survival instincts at birth? While Descartes' theory led to further research and questioning by other philosophers, it also enabled many discoveries in the world of psychology, regarding development and instinctive behavior. Within Descartes' theory of ideas is his theory of innate ideas. He quotes: “But the main question at this point concerns ideas which I take to be derived from things existing outside me: what is my reason for thinking that they are like these things? Nature apparently taught me to think that. “According to Descartes, our minds are filled with a variety of intellectual concepts – ideas whose content is derived solely from the nature of the mind. This storehouse includes ideas in mathematics, logic and metaphysics. Interestingly, Descartes argues that even our sensory ideas involve innate content. Descartes is not suggesting that these ideas are simply a creation of the mind, but rather of the brain; they were in the middle of a paper......ky thought it was both; the capacity for language formation is built into the DNA and further aided by education. Although at first glance René Descartes' theory of innate ideas does not seem to have a significant place in the world of psychology, it has served and still serves as a variable. to consider when studying the origin of instinctive knowledge and behavior. The theory suggests that ideas are formed from a kind of innate knowledge pre-written in an individual's DNA. Many scientists may not consider it a useful variable in their research, because it tends to exclude any possibility of active experimentation and leads to unanswered questions. However, even if Descartes' theory is nothing more than a theory, it could not be proven to be completely false or null and will continue to be considered both in the world of philosophy and in that of science. psychology..