Economics has accepted the principle of limitlessness of wants. Dr. Marshall has written: "The desires and wants of people are innumerable and are of various types". As a man fulfils one want, another springs up. He cannot fulfill all his wants in his entire life.
On the basis of this special feature of wants, economists established the 'Law of Progress'. Because of limitless desires, newer and newer inventions are made. As a result, the economic development of society is also achieved.