Barack Obama: “When one nation pursues a nuclear weapon, the risk of nuclear attack rises for all nations.”

People need to “rediscover what’s the story we tell about how we’re going to live together, and see each other, and recognise each other, and disagree, and yet, still care for each other”.

Use that hope to make a difference. Get involved.

A drift towards extremism was "not inevitable

If I had a blame pie for why politics is so polarised and why we're seeing a rise of populism in many places, it's because of that information that is going into our brains every day.