We live in a world where people need things from the day they are born to the day that they die.Some of these 'needs' are physical needs, a need for goods of various sorts, clothing, shelter, and so on.Some of them are emotional 'wants', a need for education, entertainment, or recreation. In satisfying such needs businessmen perforn useful services to their fellow humans. In return they expect to earn a reasonable reward for their efforts in the form of porfits.
