Member states must stop squabbling over trivial matters – and a firmer stance against states that promote Putin’s and Trump’s agenda is needed too

• Frans Timmermans is a former vice-president of the European Commission

After US vice-president JD Vance’s speech in Munich last month, most European leaders came to the conclusion that our world has fundamentally changed. The Pax Americana that long ensured peace, security and freedom in Europe is over. Anyone who still doubted this will hopefully now realise, after the disgraceful treatment Ukraine’s president Volodymyr Zelenskyy endured last Friday at the White House, that we can no longer rely on the Americans for our collective security.

We must hope for the best, but hope is not a policy. We – the Netherlands, the EU, and all western countries standing with Ukraine – must prepare for the worst. The question is this: how do we keep Ukraine free and independent, and how do we protect our economy, our freedom and democracy, and our borders?