The Socratic philosophers expressed some concerns about the new type of selling in around the 4th century BCE. Their commentary was primarily concerned with potential disruption of the more social aspects of selling. Traditional forms of exchange encouraged a social perspective - emphasising the social bonds that united members of a society. For example, during periods of drought or famine, individuals shared in the plight of their neighbours. However, the advent of this new form of selling encouraged a focus on the individual such that in times of scarcity, sellers raised their prices.