Initially, there will be no change in the world order, other than its readiness to accept messianic rule. All the nations of the world will strive to create a new world order, in which there will be no more wars or conflicts. Jealousy, hatred, greed and political strife (of the negative kind) will disappear, and all human beings will strive only for goodness, kindness and peace.
In the messianic era there will be great advances in technology, allowing a high standard of living. Food will be plentiful and cheap.
However, the focus of human aspiration will be the pursuit of the “knowledge of G‑d.” People will become less materialistic and more spiritual.