Across the Atlantic, we see more clearly than ever what happens when the extreme wealth of super-rich men becomes an attack on the public good

I have joined more than 370 millionaires from 22 countries in signing a letter calling on our political leaders to tackle the cost of extreme wealth by taxing the super-rich – people like me.

The letter has been delivered to the World Economic Forum in Davos, where more than 60 heads of state have gathered. That includes Donald Trump, who will join virtually today – days after his inauguration.

Dale Vince is a green energy industrialist and campaigner