Humanist Photography, also known as the School of Humanist Photography, manifests the Enlightenment philosophical system in social documentary practice based on a perception of social change. It emerged in the mid-twentieth-century and is associated most strongly with Europe, particularly France, where the upheavals of the two world wars originated, though it was a worldwide movement. It can be distinguished from photojournalism, with which it forms a sub-class of reportage, as it is concerned more broadly with everyday human experience, to witness mannerisms and customs, than with newsworthy events, though practitioners are conscious of conveying particular conditions and social trends, often, but not exclusively, concentrating on the underclasses or those disadvantaged by conflict, economic hardship or prejudice. Humanist photography "affirms the idea of a universal underlying human nature". Jean Claude Gautrand describes humanist photography as: