What happened during world war i that provided the impetus for widespread acceptance of school health education as a field in its own right?

During world war I, too many young men were found unfit for the service or to fight that provided the impetus for widespread acceptance of school health education as a field in its own right. After this, school health was required of all the children. In the war , bigger men and stronger soldiers with great lifting strength were required.

international economic development agencies harm poorer nations by encouraging them to serve as exporters to wealthier nations.