Editor's note

Male agression might explain why men are more likely to become soldiers. But it can’t explain why the vast majority of armies in history have been almost exclusively male. Alberto Micheletti explains how his new research suggests evolution turned a male tendency for fighting into the near-total domination of warfare – but also that things could have easily gone the other way and created a world of warring women.

The evacuation of 422 White Helmet volunteers from Syria seemingly marks the end of their high-profile humanitarian mission. To some, they are the ultimate peace campaigners and life savers but others believe they are anything but battlefield angels. James Crossland looks into the allegations against them and delves into the history of wartime humanitarianism and propaganda.

Fields of vibrant sunflowers are a common sight all over the world, but this hasn’t always been so. This tall pendulous flower, native to North America, only became a common crop when Soviet farmers started producing them for their oil. Stephen Harris walks us through the sunflower’s surprising history.

Paul Keaveny

Commissioning Editor

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Why war evolved to be a man’s game – and why that’s only now changing

Alberto Micheletti, University of St Andrews

Men have come to dominate military combat but new evidence suggests this might be more an accident than an inevitability of evolution.

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