It’s not at all time highs. Your chart combines the data for both genders, which causes the decline in employment to be masked by the separate trend of women working outside the home. Male prime age employment is down 10 percentage points from 1955: https://fred.stlouisfed.org/series/LRAC25MAUSM156S
A higher percentage of prime age adults are working outside the house than almost any time in recent US history. I don’t understand why an analysis of the state of US employment should exclude women, can you please expand on your reasoning?
