We already have the answer. 2019 was arguably the greatest year for the American economy on record. Real wages for the lowest quartile were rising at one of the fastest (if not the fastest) rates in history. Poverty as measured among Black families was at its lowest record since WW2. Unemployment was 3ish% and people were coming off the bench to work. Inflation was < 2% and in some measurements hovering around 0.

So what was the big secret? You won't want to hear it. First and foremost it was the tax cuts and jobs act. Yeah yeah, a giveaway for the rich the media says. Nonsense. Second it was getting the government out of the way of the economy and business. Removing regulations was absolutely a factor in the success. And finally it was using our influence to benefit the US first and foremost (tariffs, foreign policy etc). Of course the media has poo pooed all these things, particularly because of who was at the helm when they happened. And I don't expect anyone on HN to agree with me.