他因对人道主义的坚定信仰而投身于贫困地区的教育事业。

His strong belief in ___humanitarianism drove him to work in education in impoverished areas.

在这场灾难中，志愿者们本着人道主义精神救助了所有受灾者。

During the disaster, volunteers helped all victims based on the principle of ___humanitarianism.