Hillary ClintonHillary Diane Rodham ClintonClinton takes swipe at 'false equivalency' in media coverage of 2016 election Former presidents, first ladies come together to honor Barbara Bush Romney: Parts of Comey book read 'too much like a novel’ MORE appealed for more action on women's rights globally on Friday, calling it "the unfinished business of the 21st century" during her second public appearance since her retirement from State.

Speaking at the Women in the World Summit, Clinton said that women's advocates need to rethink their approach to the rights fight.

“We can and should be proud of what we’ve achieved, but much of our advocacy is still rooted in a 20th-century, top-down frame. The world is changing beneath our feet, and it is past time to embrace a 21st-century approach to advancing the rights of women and girls at home and across the globe,” she said.

It was Clinton's second public appearance since retiring as secretary of State in late January, and though she said nothing about her own future, her reemergence on the national stage has fed speculation surrounding her 2016 plans.

Earlier this week, she also spoke on women's rights, appearing on the same stage as Vice President Biden, another potential 2016 presidential contender.

Clinton will give two paid addresses in the coming weeks, in Texas and Colorado, and has just signed a book deal on her time at State. 

Her movement back into the public sphere, so soon after she retired and despite proclaiming she'd like to spend some time as a private citizen, is an early indication she has long-term plans in the works.

But it's still unclear, even for some of her closest advisers, what those long-term plans are. 

James Carville, a friend and longtime Clinton supporter, said on MSNBC on Friday he doesn't expect Clinton to make a decision until after the midterm elections.

"We are going to continue to talk about it, and she is not going to make up her mind, probably, until after the midterms. We're just going to be sitting around here waiting and there's not much we can do about it," he said.