Caleb Scharf

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Writing for PS since 2014
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Caleb Scharf is Director of Astrobiology at Columbia University. His next book, The Copernicus Complex, will be published in September 2014.

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Our Cosmic Context

NASA/ESA/Hubble

May 5, 2014 Caleb Scharf explains how investigations into life on other planets help us to understand Earth's challenges.

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 Michele Tantussi/Getty Images

Germany’s Populist Temptation

Apr 19, 2018 Sławomir Sierakowski laments the Christian Social Union's turn to the right since the federal elections last year.

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Mikhail Metzel\TASS via Getty Images

The West’s Crisis of Confidence

Apr 19, 2018 Carl Bildt worries that the two countries most responsible for creating the postwar global order are now abandoning it.

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Kevin Frayer/Getty Images

No Blank Check for Development Banks

Apr 19, 2018 Kevin P. Gallagher & Jörg Haas want to compel the World Bank and its partner institutions to commit to climate-friendly infrastructure.

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Matthew Daniels/U.S. Navy via Getty Images

Missile Strikes Are Not a Syria Strategy

Apr 19, 2018 Richard N. Haass thinks the latest US, British, and French attack failed to achieve even the tactical goal of deterrence.

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YE AUNG THU/AFP/Getty Images

The “Next Eleven” and the World Economy

Apr 18, 2018 Jim O'Neill assesses the economic potential of the bloc of countries coming in the wake of the BRICs.

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Should We Really Care About Inequality?

Apr 18, 2018 Jason Furman questions whether policymakers should be concerned with balancing economic growth and inequality.

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Drew Angerer/Getty Images

A Trade Tutorial for Trump

Apr 18, 2018 Asad Jamal shows what today's US protectionists are getting wrong – and why their ignorance is so dangerous.

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Richard Lautens/Toronto Star via Getty Images

Automation and American Leadership

Apr 18, 2018 Robert Skidelsky suggests that economic equity and global technological dominance might be incompatible political goals.

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