“While history does not repeat itself precisely, the Middle East today bears a worrying resemblance to the Balkans then,” she says. “A similar mix of toxic nationalisms threatens to draw in outside powers as the US, Turkey, Russia, and Iran look to protect their interests and clients.”

Professor MacMillan highlights a string of other parallels between today and a century ago. Modern-day Islamist terrorists mirror the revolutionary communists and anarchists who carried out a string of assassinations in the name of a philosophy that sanctioned murder to achieve their vision of a better world. And in 1914, Germany was a rising force that sought to challenge the pre-eminent power of the time, the UK. Today, the growing power of China is perceived as a threat by some in the US.

Transitions from one world power to another are always seen as dangerous times. In the late 1920s, the US drew up plans for a war with the British Empire that would have seen the invasion of Canada, partly because it was assumed conflict would break out as America took over as the world’s main superpower.

Professor MacMillan, whose book The War That Ended Peace was published last year, said right-wing and nationalist sentiments were rising across the world and had also been a factor before the First World War