Human Costs of War documents and analyses the direct and indirect toll that war takes on civilians and their livelihoods, taking a human security approach exploring personal, economic, political and community security in Afghanistan, Iraq and Ukraine, in the contexts of the War on Terror and the New Cold War. The book offers an understanding of war through the recording and comprehension of its civilian casualties and evaluates whether the force used has been proportionate to the threat that prompted it and the concern for human welfare. In the 21st century, the power of the USA has declined, while countries such as China and India become more powerful. The global power balance has been altered in a fundamental way towards a multi-polar world system, with the West no longer able to enforce its policies abroad. Regional and global governance are not assured, and devastating wars have taken a heavy toll in terms of death, poverty and displacement, which feed into the cycle of long-term insecurity. The authors argue that it is important for any conflict to be understood not only in terms of the perpetrators of violence, or of the political and economic reasons behind it, but also in terms of its impact on the civilian population and their security, focusing on conflicts in the Middle East which followed 9/11 and Russia’s invasion of Ukraine. The book will be of interest to academics, the public, the media, security agencies and international organisations. It will be useful for undergraduate and postgraduate students of International Relations, International Law, Security, Politics, Policing, Human Rights, Ethics, Peace Studies, Eastern Europe, American Studies and the Middle East.