mel|io|rism «MEEL yuh rihz uhm, MEE lee uh-», noun.
the doctrine or belief, fundamental to some systems of ethics, that the world tends naturally to become better or is capable of being made better by human effort, a mean between pessimism and optimism: »
Meliorism is…to proceed according to sociological principles and to educate the young to a higher level of intelligence and morality (Hinkle and Hinkle).
Useful english dictionary. 2012.