Barack Obama: “Australia has been our most stalwart ally when it comes to troop deployments and the effort there.”

It is a decision about how do we face and embrace this finite amount of time we have on the planet.

I’m going to insist that we can do better than we’re doing right now.

A drift towards extremism was "not inevitable

When we choose, when we make that decision, I do believe – and there is evidence for this – that the world gets incrementally better, and that is a worthy goal and it’s worth fighting for.