Abstract
The article explores how changed patterns of UN membership affected the prospects for UN Security Council institutional reform. First, we outline a theoretical framework based on path dependency, veto player analysis and social choice theory. Second, we offer calculations of decision probability and show that a higher voting threshold lowers chances of winning coalitions in a non-linear fashion. Third, we explore the specific decision-making procedures for UNSC reform and which actors can block reform. We conclude that not only diverging preferences, but that hurdles established early on combined with membership growth have ‘locked in’ the current institutional arrangement.
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