I wouldn’t say the US lost WWII. America has ‘lost’ itself because of the prosperity that followed WWII. More money, jobs, success AND FREE TIME for leisure and learning activities that allowed the seeds of liberalism and social decadence to thrive.
When jobs were abundant and paid well, mom could stay home with the kids.
When gargantuan government began growing, it required two paychecks to have the same comforts of life. The loss of the one-income family and the rise of “child care” has been devastating.