Stephan Chambers, 03/31/12

Chairman, Skoll Centre for Social Entrepreneurship; Director, MBA at Oxford University’s Saïd Business School

I have cried every day this week. Remember as I tell you this, that I'm male. And British. And from Oxford. I cried when I heard Nick Danziger. I cried when I heard Eve Ensler. I cried when I heard Annie Lennox. I've also smiled a lot.

Marlo Thomas, 03/29/12

Actrice, auteur et activiste

Even if you have to drive across state lines to see Bully, your kids need to be in the audience. Whether you know it or not, they may be among the 13 million American children affected by bullying every year. For them, this is more than just a movie. It is real life.

D.L. Hughley, 03/29/12

Actor and stand-up comedian

Last week, Geraldo Rivera got into it with his comments on the Trayvon Martin killing. What Rivera said was insidious -- but like most insidious comments, there is an element of truth to them.

Arianna Huffington, 03/28/12

In negotiating with John Boehner, why did the Obama administration prioritize debt reduction? Millions did what Obama asked in 2008 and voted their hopes, but how many were hoping for the Grand Bargain we really got?

James Zogby, 03/31/12

President, Arab American Institute; author, 'Arab Voices'

There must be an acknowledgment of the wrong that has been done to our communities and to our country's ability to respectfully engage with Arabs and Muslims. This is vital to our future as Americans.

Al Franken, 03/30/12

U.S. Senator from Minnesota

Most Americans don't think about antitrust law when they look at their cable bill, flip channels on TV, or worry about what their favorite website knows about them. But they should.

Lee Woodruff, 03/28/12

Co-author, 'In an Instant'

Young women today tell me they will not delay childbearing. They have seen too many women wake up at 40 wearing the "I forgot to have kids" sandwich board. And I hold my tongue. There is no cookie-cutter approach to any of this, no one-size-fits-all.

Richard Branson, 03/28/12

Founder, Virgin Group

This week Jim Cameron has shown the world it is possible to take 21st-century camera technology to the depths -- he has sparked humankind's curiosity to discover more.

Harvey Fierstein, 03/29/12

Multiple Tony-Award-winning actor

I wanted to make at least one cogent argument defending print media to a culture that doesn't seem to care if the daily paper disappears altogether. What could that argument be?

Melinda Gates, 03/29/12

Co-chair, the Bill and Melinda Gates Foundation

There's no greater honor than to take to the stage alongside a line-up of individuals from around the globe for whom I have such great respect. This year's speakers are all unique in their talents and perspectives, but they also have much in common: a strong belief in our ability to change the world for good.

Dean Baker, 03/26/12

Co-director, CEPR; author, 'The End of Loser Liberalism: Making Markets Progressive'

Given their heroic role in the financial reform debate, I am not anxious to criticize Johnson and Kwak's new book, White House Burning. But there are some important areas of difference that deserve attention.

Evan Shapiro, 03/28/12

President, IFC

When a young white girl goes missing in America, it immediately becomes a national story. However, when a young black person is killed or goes missing in America, very few people outside their family hear about it.

Anya Strzemien, 03/29/12

Editor-in-Chief of Stylelist, Stylelist Home and HuffPost Style

Even though I'm not normally one for saccharine self-affirmations and cheesy platitudes, I want to use the comments section of this post to flip the script and ask you all to say something positive about yourselves.

Jared Leto, 03/26/12

Musician, actor, director, producer, businessman, artist

The experiences I had upon going back to Haiti and seeing the incredible poverty and turmoil this already impoverished nation was coping with have affected my life in a way that has forever changed me.

Cenk Uygur, 03/29/12

Host, 'The Young Turks'

It was a similar crew of conservative justices on the Supreme Court that decided that their long-held beliefs on states' rights were irrelevant and made George W. Bush our next president in 2000. Now, they're back -- and they might decide yet another presidential election.

Tammy Baldwin, 03/26/12

Fighting for Wisconsin -- US Senate 2012

It may surprise a lot of people to find Ronald Reagan, Barack Obama, Sheldon Whitehouse and I on the same side of anything. But with an issue like this that makes so much sense the real question is, why does today's right wing disagree?

Rep. Keith Ellison, 03/26/12

Co-chair, Congressional Progressive Caucus; U.S. Representative for Minnesota's 5th District

It's happened again: I said something that speared a GOP sacred cow and the right-wing Twitterverse is losing its cool.

Kenny Loggins, 03/30/12

Singer/songwriter

What I now need in my life is to keep making music, to stay creative and follow the muse. There are no "laurels to rest upon." Not really. To feel productive and creative is my life-blood, and it sustains a sense of well-being that surpasses even the best endorphin high.

Tiffani Thiessen, 03/26/12

Actress, USA Network's 'White Collar'

Over the last month, I've been honored to team up with Baby Buggy and fellow actress and mother Elisabeth Röhm to give back to parents in need and make the world a little kinder in the process.

Jeremy Rifkin, 03/28/12

Author, 'The Third Industrial Revolution: How Lateral Power Is Transforming Energy, the Economy, and the World'

In the same way that the Internet radically reduced entry costs in generating and disseminating information, giving rise to new businesses like Google and Facebook, additive manufacturing has the potential to greatly reduce the cost of producing hard goods.

Randy Jackson and Mark Shriver, 03/30/12

It is up to each of us to raise awareness of the fact that almost 25 percent of our children live in poverty and each of us must hold our leaders accountable to ensuring a fair start for every kid in America.

Dr. Peggy Drexler, 03/26/12

Author, 'Our Fathers, Ourselves. Daughters, Fathers, and the Changing American Family'

It's wonderful what dogs do for us. But the best part might be what they let us do for them. All in all, not a bad deal.

Sen. John Kerry, 03/30/12

U.S. Senator from Massachusetts

In our country, a child is abused or neglected every 36 seconds, and only 40 percent of abused children receive the services they need. The Protect Our Kids Act can be the catalyst we need to begin to speak out more effectively for children who cannot speak up on their own.

Dan Rather, 03/29/12

Host, 'Dan Rather Reports'

Two weeks ago, I made the transit through the Strait of Hormuz to the Arabian Sea. Surrounded by a destroyer, a missile cruiser and several Seahawk helicopters, we were hardly inconspicuous as we transited the Strait. And that is the point.