The evolution of banking regulation and banking crises are highly intertwined. The post–World War Two period was marked the globalisation of banking and increased banking instability. This initiated a trend towards harmonised frameworks for banking regulation, leading to a common framework for measuring capital adequacy in 1988 (Basel I). The path towards the Basel framework in 1988 was very different in the United States, the United Kingdom, and Switzerland. When statutory capital requirements were introduced in Switzerland in 1935, most banks were indifferent. This indifference changed towards the end of the 1950s, when capital regulation became a bottleneck for growth. The United Kingdom lacked the experience of a solvency crisis during the 1930s, resulting in capital in banking becoming an almost irrelevant topic. It took until the secondary banking crisis in 1973/4 for banks’ regulation to be reconsidered. The United States did experience a deep banking crisis in the 1930s but introduced statutory capital requirements only in the 1980s, following increased domestic banking instability and the threat of potentially high losses from the Latin American debt crisis.