“…Yet impressive as this scholarship is, scholars have thus far not systematically informed us of the consequences of these challenges: Whether IOs are in fact in decline—defined as a ‘gradual and continuous loss of strength, numbers, quality, or value’ (Oxford Dictionary, n.d.). We know about the establishment and design of IOs (Hooghe et al, 2019; Johnson, 2013; Koremenos et al, 2001), their development (Barnett & Coleman, 2005; Colgan et al, 2012; Hanrieder, 2015; Lipscy, 2017) and increasingly also their death and replacement (Cottrell, 2016; Debre & Dijkstra, 2021; Dijkstra & Debre, 2022; Eilstrup‐Sangiovanni, 2020, 2021; Gray, 2018; Shanks et al, 1996). But the phase of decline —which normally precedes death or replacement—remains understudied.…”