The storylines of the soap opera The Young and the Restless have changed over the years since the show debuted in 1973. Originally examining the lives of the wealthy Brooks and the poor Fosters, a series of recasts and departures in the early 1980s turned the focus of The Young and the Restless to the Abbotts and the Newmans, including the corporate rivalry between their two respective companies. However, one basic plot that has run throughout almost all of the program's history is the rivalry between Jill Foster Abbott and Katherine Chancellor, similar to the show's sister show, The Bold and the Beautiful, regarding Brooke Logan and Stephanie Forrester.