Commissioned by the UN Secretary General, the report of the High-level Panel on Threats, Challenges and Changes explores a range of current and evolving threats to international peace and security, and assesses how well existing policies and international institutions have done in addressing these challenges. The report was written by an independent panel of 16 people comprising former heads of state and foreign ministers, as well as security, military, diplomatic and development officials. It makes a number of recommendations to strengthen the international framework of collective security and to promote a more effective UN for the 21st century, based on the recognition that today's security threats, whether they be terrorism, civil wars or extreme poverty, are all interconnected and require comprehensive strategies to address them. This Command Paper sets out the text of the report with the aim of stimulating a public debate in the UK on the issues raised.