Disney Princess Movies

disney princess movies
Why Wasnt there Disney Princess movies produced from 1960-1987?

I am working on a Sociology Senior Sem. research on the Disney Princess movies and I noticed that from 1960-1987 there wasnt a movie produced. Does anyone know why there was such a large gap in that time period?

I would guess they all went on LSD and spent there time on like Alice and Wonderland stuff instead…