Complex sentence: According to Barbara Diggs-Brown from the American University School of Communications, the history of public relations didn't begin until around 1900, but the PR field anchors their work in ancient events to improve the perceived validity of the field.
Split into simpler sentences: According to Barbara Diggs-Brown from the American University School of Communications, the history of public relations didn't begin until around 1900. She claims the PR field anchors its work in ancient events to improve the perceived validity of the field.