A humanitarian is basically a person who stands up for the rights of others. it can be likened to a philanthropist
Supplying humanitarin aid to a country.
Operation Restore Hope was a humanitarin effort that became violent; and thus was terminated when the mission was deemed no longer worth the effort. The original mission was to medically help, and feed, the needy of that particular region.
Nations interact with each other through diplomatic channels, such as embassies and international organizations. They engage in trade, negotiate treaties, participate in alliances, and collaborate on global issues like climate change and security. Conflicts between nations can lead to diplomatic tensions, sanctions, or even military action.