Global health politics has emerged over the last two decades as a distinct, interdisciplinary field of study which, although its boundaries are not set, is beginning to demonstrate signs of maturity. It is concerned with the actions, practices, and policies that govern the sphere of global health. Its emergence is intimately linked with the reconceptualisation of health as global. The field addresses not only the processes of decision-making, but also the structures of power that shape what is possible and the requirement for collective action to address global problems. Politics is unavoidable, necessary, and integral to effectively addressing global health challenges. The study of global health politics therefore is not about how to minimise interference in rational decision-making, but rather about explaining and improving the quality of political institutions and processes that will, in turn, improve global health action and, ultimately, outcomes. Fundamental to this is an understanding of the nature of politics and the workings of power. But the field also requires knowledge and techniques from a variety of disciplines, which intersect to produce a more complete understanding than any one discipline can provide. The result is inherently both multi- and interdisciplinary, characterised by methodological pluralism and varied theoretical perspectives.