In a recent keynote at the One Young World Summit 2012, Fatima Bhutto spoke to a group of young “ambassadors” about the importance of collaboration in inspiring global change.

“Every woman in this room is powerful and every man in this room is powerful too,” Jessica Jackley says in a keynote at the One Young World Summit 2012, “[and] we have to be careful because sometimes that power goes unused.” This is especially true, she says, if you don’t believe in yourself and don’t believe in the potential of others. As the co-founder of the micro-loaning website KIVA explains, you can have the best ideas and tools at your disposal—but none of that matters in you don’t believe that you have the potential to make a change.

In this video, Change.org founder Ben Rattray—who was recently named one of TIME’s most influential people of the year—argues that “everyday people can do extraordinary things.”

Here’s a classic speech from Michael “Pinball” Clemons, who recently gave a pre-game pep talk to the 2012 Grey Cup Champion Toronto Argonauts.

“Film found me,” says legendary filmmaker Spike Lee in a recent interview with mediabistroTV. “Notice what I said. ‘Film found me.’ I didn’t say, ‘I found film.’” In the interview, Lee urges today’s youth to pursue careers that fascinate, inspire and engage them—rather than aim for money alone.

Ben Rattray, founder and CEO of Change.org, talking with Fast Company.

Yvonne Camus may be the best—and certainly the most motivational—speaker you’ve never heard of. Here she is talking about teamwork, “heated arguments,” and why arguing takes a tremendous amount of physical energy—so why do it?