What steps has the international community take into address humanitarian crises throughout the 20th and 21st centuries, including human rights abuses?

Problems that are dealt with regarding human rights abuses and humanitarian crises: poverty, slavery, people being tortured/abused, etc. International response can help by giving the needed $$$ to repair lost homes, or to provide food and clothing health, and schooling. You can help by volunteering, or donating money/essential items

The creation of the U.N. (United Nations) created an international dialogue for these issues, they have intervened in many issues on human rights, one example being the Rwandan genocide which the U.N. sent peacekeeping forces which were largely ineffective, and the mission in South Sedan which is still dominated by civil war and civilian deaths