Medical lessons learnt from the US and Canadian experience of treating combat casualties from Afghanistan and Iraq.
The Winston Churchill Memorial Trust, established in 1965, funds Travelling Fellowships and both authors visited hospitals in Germany, Canada and the USA regarded as centres of excellence with expertise in the early care, reconstruction and rehabilitation of the combat casualties of our NATO Allies, as recipients of these Fellowships. This article presents some of the lessons learnt in the field of musculoskeletal trauma and rehabilitation from the Canadian and US military medical systems. In trauma, there were significant differences in wound debridement policy, use of external fixators for fractures, primary use of circular frames for open tibial fractures and a far more liberal use of bone morphogenetic protein in fracture treatment. Differencesnormative approach to IR, by considering ethics. This is something which has often been ignored under "traditional" IR as positivist theories make a distinction between "facts" and normative judgments, or "values". During the late 1980s and the 1990s, debate between positivists and post-positivists became the dominant debate and has been described as constituting the Third "Great Debate" (Lapid 1989).

Schools of thought

Realism
Realism focuses on state security and power above all else. Early realists such as E. H. Carr and Hans Morgenthau argued that states are self-interested, power-seeking rational actors, who seek to maximize their security and chances of survival. Cooperation between states is a way to maximize each individual state's security (as opposed to more idealistic reasons). Similarly, any act of war must be based on self-interest, rather than