Nancy Pelosi, Hillary Clinton, Elizabeth Warren and Kamala Harris Speak of Women’s Vote Centennial at Democratic Convention

It included black-and-white images from 1920 and images from 2017, after President Trump had taken office and women marched in protest wearing vivid pink knitted caps.

In clips stitched into the montage, Justice Ruth Bader Ginsburg spoke before members of the United States Senate; Representative Pramila Jayapal of Washington reclaimed her speaking time from Attorney General William P. Barr at a hearing; Mrs. Clinton herself, eight years before she became the first woman nominated for president by a major party, spoke of failing to shatter “that highest, hardest glass ceiling” but putting “about 18 million cracks in it.”

Senator Elizabeth Warren, the first woman elected to the United States Senate from Massachusetts, warned that “you don’t get what you don’t fight for.” And Stacey Abrams, the former Democratic candidate for governor of Georgia, put it simply: “This is our time,” she declared.

Other speakers, from former President Barack Obama to the actress Kerry Washington, invoked past and ongoing fights for equality.

“When our Constitution was written, women couldn’t vote, Black people were considered three-fifths of a human being,” Ms. Washington said.

Mr. Obama urged faith in the system, while acknowledging its failings.

“It wasn’t a perfect document,” he said of the Constitution. “It allowed for the inhumanity of slavery. And failed to guarantee women and even men who didn’t own property the right to participate in the political process.”

Some speakers, though, offered an appeal that transcended race and gender.

Some happened to be women, like Representative Gabrielle Giffords of Arizona, but her message was for all citizens, men and women.

“Vote, vote, vote,” Ms. Giffords urged.