Why Liberty ships were essential and an interwar merchant race could have changed the Atlantic

How important was Liberty-ship production to the Allied war effort?

It was indispensable, because mass-produced cargo capacity sustained global operations; a larger, faster interwar merchant fleet would also have made German interception substantially harder.

The panel treats Liberty-ship output as a prerequisite for waging a global war rather than a supporting detail. American First World War merchant construction showed what government funding could create, but investment fell away when commercial and political support did not continue. A sustained Anglo-American shipbuilding competition in the 1920s could have produced a larger fleet of faster ships before 1939. Even a few extra knots would shorten Atlantic exposure, complicate U-boat positioning, and reduce the time available to assemble wolf packs.