An informal ideology
Humanitarianism is an informal ideology of practice; it is "the doctrine that people's duty is to promote human welfare."
Humanitarianism is based on a view that all human beings deserve respect and dignity and should be treated as such. Therefore, humanitarians work towards advancing the well-being of humanity as a whole. It is the antithesis of the "us vs. them" mentality that characterizes tribalism and ethnic nationalism. Humanitarians abhor slavery, violation of basic and human rights, and discrimination on the basis of features such as skin colour, religion, ancestry, or place of birth. Humanitarianism drives people to save lives, alleviate suffering, and promote human dignity in the middle of man-made or natural disasters. Humanitarianism is embraced by movements and people across the political spectrum. The informal ideology can be summed up by a quote from Albert Schweitzer: "Humanitarianism consists in never sacrificing a human being to a purpose."