How can our current leaders change the world?

They can’t.

They play by the rules of the old system, yet we need a new system that obsoletes it. As long as they try to win not only at a dying game, but at a game that kills, they are not functional leaders.

How then can we ourselves become citizens for a more beautiful future?

By not participating in the dying game. If we still are, we can’t also claim to try to achieve anything meaningful. It sounds a bit harsh and it doesn’t mean that we need to opt out of society. It means that we - step by step - opt-out of inadequate mechanisms and participate in creating new ones. For ourselves personally and for society.

Let me rephrase this, because it’s important: we don’t opt-out of society, we participate in recreating it.