Exploring the socioeconomic conditions of the post-WWII world and its trajectory is the differentiation. If the conditions of the past were changed such that any other country effectively won WWII via no loss to their industrial production most would've likely followed a similar path as America did as far as a proclivity towards neoliberal regulation is concerned. America is only different because it was not in Europe. Instead Europe was all destroyed and they all had to come together for better means rather than perpetually endorse their own destruction. The United Kingdom certainly did adopt more neoliberal regulation than most relative to the EU and I believe there exists a similar logic that explains this difference.