New British Prime Minister Keir Starmer pledges that the UK will reengage in global leadership, focusing on tackling climate change, international development, and conflicts in various regions. He emphasizes the need for nations to work together to make the world less dangerous and calls for global action on arms control and combating weapons proliferation. Starmer also highlights the UK's shift towards partnership and equal respect in its international relations, offering game-changing British expertise to other countries. He rejects fatalism and vows to work towards reducing conflict, instability, and injustice.