Monetary Reform in 20th Century, went through different phases

In 1920s linked to restoration of gold standard, achieve in the middle 1920s.
In 1930s linked to restoration of gold standard and reflation. Keynes’ Means to Prosperity.
In 1940s linked to post-war reconstruction: Keynes’ “bancor” and White’s “unitas,” ideas that failed.
In 1960s, reform linked to preventing a breakdown of the gold-dollar system.
In early 1970s, linked to restoring international monetary system (e.g. Committee of Twenty).

In 1920s linked to restoration of gold standard, achieve in the middle 1920s.