Editor's note

The Supreme Court yesterday upheld Donald Trump’s travel ban, which bars people from several majority Muslim countries from entering the United States on national security grounds. Just because a policy is legal doesn’t make it effective, contends Rebecca Jayne Wolfe. She has studied political violence worldwide – including in countries targeted by Trump’s ban – and says profiling extremists simply doesn’t work.

These days, it seems like everyone is talking about the border crisis. But there is no crisis, says sociologist Doug Massey. Data show that the rate of undocumented migration from Mexico is approaching zero, and the number of immigrants from other Central American countries is small by historic standards.

And, in the lead-up to the World Cup, news leaked that Russian workers were being taught how to smile at foreign soccer fans. Professors of psychology Samuel Putnam and Masha Gartstein confirm that the “smile gap” is real – and explain why it shouldn’t be seen as a sign that Russians are unfriendly, callous people.

Catesby Holmes

Global Affairs Editor

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People protest the U.S. Supreme Court ruling upholding President Donald Trump’s travel ban outside the Supreme Court in Washington, June 26, 2018. AP Photo/Carolyn Kaster

Trump travel ban targeting Muslims will not make America safer

Rebecca Jayne Wolfe, Yale University

Terrorists are wealthy. They're poor. They're Christian. They're atheists. They come from all over. That's why US counterterrorism efforts must be more nuanced than just barring Muslims.

A Border Patrol agent in New Mexico. REUTERS/Jose Luis Gonzalez

Today’s US-Mexico 'border crisis' in 6 charts

Douglas Massey, Princeton University

Undocumented entries across the border are at all-time lows. The people now arriving are not Mexican workers, but a smaller number of Central American families seeking to escape dire circumstances.

Say cheese … or not. A woman works a stand at a cheese festival in Moscow, Russia. AP Photo/Pavel Golovkin

Why are Russians so stingy with their smiles?

Samuel Putnam, Bowdoin College; Masha A. Gartstein, Washington State University

In the US, smiling is a reflexive gesture of goodwill, but Russians view it as a sign of stupidity. Social psychology research could help explain this cultural contrast.

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