There are many, many, many ways the world could end, from nuclear explosions to meteors and global pandemics.

But if and when Armageddon comes, there are three men you could probably blame, an expert has revealed.

US President Donald Trump, Russian President Vladimir Putin, and China’s top leader, Xi Jinping, are ‘a walking version of the dark triad’, said Dr Luke Kemp, of the Centre for the Study of Existential Risk at the University of Cambridge.

The trinity consists of narcissism, psychopathy and Machiavellianism, a word for the cunning of the Italian leader Niccoló Machiavelli.

These toxic traits have long been found in the ruling classes behind civilisations that now lie in ruin, Dr Kemp found.

He told The Guardian: ‘Trump is a textbook narcissist, Putin is a cold psychopath and

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