If we study the economy of a village, the idiosyncrasies of every individual in it are of importance.
These idiosyncrasies are not confined to drugs, but are seen with a few articles of food, such as eggs and shellfish.
Dating also provides an opportunity to discover if the idiosyncrasies of the other person are a turn off or a turn on.
If the village is replaced by a large area, inhabited by millions, with modern facilities of communication, it is a matter of observation and experience that for the purposes of general reasoning the idiosyncrasies of individuals may be neglected.
But even in his most sweeping reforms he never lost sight of the idiosyncrasies of the people.