Donald Tusk

Prime Minister of Poland

Ian Bremmer

President and Founder of Eurasia Group & GZERO Media

How Far Away Is a Ceasefire? | Ian Bremmer

Daniel Altman

Global Economist, Strategy Expert, Sports Analytics Pioneer

Seth Berkley

Global Health Expert and Epidemiologist; Senior Advisor to Brown University Pandemic Center

Ray Zahab

Ultra-marathon Runner and Adventurer; Host, "The Project"; Author of "Running for My Life"

Peter Thiel

Former CEO & Co-founder of PayPal; Entrepreneur and Venture Capitalist

Peter Thiel | Cambridge Union

John Zogby

Pollster, Author, Political Analyst

Joseph Stiglitz

Nobel Prize Winner; American Economist; Professor at Columbia University

What's happening in the United States?

Ralph Nader

Consumer Advocate, Lawyer & Author; Former Independent Presidential Candidate

Stuart Eizenstat

Former Deputy Secretary of the Treasury & US Ambassador to the European Union

Richard Dreyfuss

Academy Award-Winning Actor

Sir Richard Branson

Businessman & Founder of Virgin Group

Matthew Olsen

Former Director of NCTC, Cybersecurity Firm Leader, National Security Analyst

Peter Zeihan

Energy & Geopolitical Strategist, Author of "The Absent Superpower" & "The Accidental Superpower"

Valdis Dombrovskis

Executive Vice-President of the European Commission & European Commissioner for Trade; Former Prime Minister of Latvia

Sharan Burrow

International Labor Rights Advocate & First Female General Secretary of the ITUC

Hugh Evans

Humanitarian, Social Entrepreneur & International Development Advocate; Founder & CEO at Global Citizen

Dean Karlan

Economics Professor, Poverty Alleviation Expert, Nonprofit Founder

Prince Zeid Ra’ad Al Hussein

Diplomat & Former United Nations High Commissioner for Human Rights

Rye Barcott

U.S. Marine Veteran, Social Entrepreneur, Author

Bing West

Correspondent & Military Author

Pedro Solbes

European Politician & Finance Expert

Planet Money

NPR's Multimedia Team on the Global Economy

Calvin Helin

Expert on Aboriginal Affairs & Author of Dances with Dependency

Jared Cohen

President, Jigsaw (previously Google Ideas) & Chief Advisor to Alphabet Executive Chairman (former Google CEO) Eric Schmidt

Bill Gates

Co-Founder of Microsoft; Co-Chair of the Bill & Melinda Gates Foundation

Jim Wallis

Theologian, Writer, Political Activist & Racial Justice Advocate

David Remnick

Editor, The New Yorker

John Wood

Founder of Room to Read, Author, Social Entrepreneur

Nicholas Burns

Professor of the Practice of Diplomacy & International Politics, Harvard Kennedy School