Welcome to Trump’s America, The i Paper’s World Insight series presenting the sharpest, deepest thinking on an era-defining shift in history and politics, investigating how Donald Trump and his administration have changed the US and the world – and where we go from here.

• America can’t afford to retire• The US is becoming impossible to live in• I told Trump over dinner he didn’t have my loyalty – it sealed my fate• This is how the world will look after Trump• I’ve seen what ICE has done to Minnesota. Farage wants to import that to the UK• The men who want to stop women voting• Trump isn’t damaging America. He’s reinventing it’

Why are Americans richer than Britons?

On the face of it, the facts are straightforward: GDP (Gross Domestic Product) per head is much higher in the US than in the UK. It has been so since the 1890s, bar a short period in the 1930s when the depression in the US was much more severe than that of the UK.

The Second World War saddled Britain with huge debts, and since the financial crash of 2008/9, the gap has widened until GDP per head is now roughly 30 per cent higher in America.