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  

pepin the short[a] (german: pippin der kurze, french: pépin le bref, c. 714 – 24 september 768) was the king of the franks from 751 until his death. he was the first of the carolingians to become king.[b][2]

the younger son of the frankish prince charles martel and his wife rotrude, pepin's upbringing was distinguished by the ecclesiastical education he had received from the monks of st. denis. succeeding his father as the mayor of the palace in 741, pepin reigned over francia jointly with his elder brother carloman. pepin ruled in neustria, burgundy, and provence, while his brother carloman established himself in austrasia, alemannia and thuringia. the brothers were active in suppressing revolts led by the bavarians, aquitanians, saxons, and the alemanni in the early years of their reign. in 743, they ended the frankish interregnum by choosing childeric iii, who was to be the last merovingian monarch, as figurehead king of the franks.

it proved indian land claims were unjustified.