PARK CITY, Utah (AP) ― Diversity is king at the Sundance Film Festival ― and queen, too.

For the first time, half of the films featured at the festival were made by women.

Festival founder Robert Redford opened the event Thursday and said “diversity is the point’’ of the independent film showcase, further evidenced by contributions from 32 countries and 51 first-time filmmakers this year. The chorus of voices represented at Sundance “reflects the times we’re in,’’ he said.

“What Sundance stands for is giving new voices and new filmmakers an opportunity to be seen and heard,’’ Redford said in an interview. “We show what’s there, and what comes up will usually give you an indication of changing times.’’

Redford, along with festival director John Cooper and Sundance Institute director Keri Putnam, opened the 11-day festival with a news conference at the Egyptian Theatre in Park City, Utah, Sundance’s home since 1981.

The films featured at the festival, like all art, reflect and inspire change, Redford told reporters.

“The festival, being as diverse as it is, shows all kinds of content, and that gives the audience a chance to choose,’’ he said. “That’s not quite so available in the main marketplace.’’

One of the most significant changes he’s noticed over his years in filmmaking is the role sex plays on screen. Several of the festival films deal with sex: “Lovelace’’ looks at porn star Linda Lovelace, “Interior. Leather Bar.’’ examines the gay, S&M leather-bar scene in the early `80s, “Two Mothers’’ follows a pair of friends who have affairs with each other’s (adult) sons, and “Kink’’ is about the business of bondage and discipline pornography.

“When I got into the film business in the early `60s, it was a romantic time. Sex and romance were pretty well tied together,’’ Redford said. “Now, 40, 50 years later, we see that sexual relations have moved to a place where it doesn’t feel like there’s so much romance involved. ... Relations have changed, and they’ve changed because of changing times and because of new technology. People are texting rather than dating and all that kind of stuff.

“We just show what’s there. We don’t predict anything. We don’t shape anything. ... We might be agents for change, but we’re not shape-shifters. So there you have sexual relations and you look at how sex is treated today: It’s just simply a reflection of the times we’re living in and nothing more.’’