Following world war ii, how did the world’s leaders promote peace and reduce poverty?

Explanation:  World leaders promoted peace, through the signing of the San Francisco Peace Treaty. With this document, the aim was to put an end to World War II, financially compensate the victims of the conflict to reduce a little the negative impact caused by the war and therefore poverty for the damages caused by the war action, as well as to return the sovereignty to Japan and take away the label of imperial power. With the signing of this document, the United Nations letter was taken into account and the Universal Declaration of Human Rights was used. In total, 49 nations supported this agreement through their signatures officially.

necessary and proper clause. the congress shall have power to all laws which shall be necessary and proper for carrying into execution the foregoing powers, and all other powers vested by this constitution in the government of the united states, or in any department or officer thereof.