Franklin D Roosavelt famously said , the only thing we have to fear , is fear itself … the context of which , was in ref to the great depression facing the American people at the time, and that the hardship ahead was tenable if each individual would do their part to weather the storm .. one may then ask the question what fear actually is .. , has its function changed over course of human evolution , why are we born with some innate fears that are biological traits and others we acquire through exposure or learning , both it seems serving as a function in our growth and development and changing culture and traditions.