“…Other illustrations include the global governance of energy(Downie, 2020), artificial intelligence(Cihon et al, 2020), and forestry(Zeitlin & Overdevest, 2020).2 For this reason, it is rarely feasible to compare HICs to regime complexes in the same issue areas.3 On the prevalence of regime complexes, seeAlter and Raustiala (2018). Regime complexes arose in large part because treaties and FIGOs proliferated during the second part of the twentieth century(Shanks et al, 1996), leading to concerns over "treaty congestion"(Brown, 1992: 679) and "regime density"(Young, 1996: 20).4 A governance "architecture" is an overarching view of governance arrangements at a point in time, including actors, institutions, ideas, principles and norms(Biermann & Kim 2020: 4-7).…”