In 1965 I was T minus 6 years and counting and having been born in the summer of 1971 I grew up with Paul Harvey's voice on the radio from time to time and in the mid-90s heard him everyday. Then one day he was gone for a spell only to return to my relief (and many others). A wise, articulate man that told it like it was and is. The slide of these United States had begun before 1965 because Paul already saw those things invading our society so when did it start? Anne Coulter has said it could have started with women's suffrage (1920), conservatives believe it started with FDRs New Deal (1933) and liberals don't see a damn thing wrong.
It actually started around the 1880's when European socialist immigrants began organizing labor unions.
The things they started off with may have been needed, such as child labor laws , but to the socialists they were just stepping stones to to the eventual demise of the American Republic.
Here's another look at it.
Those kids in sweat shops were helping support their families.
What happened when they were no longer allowed to do so ?
They became dependent on "social programs".
Remember, the Russian Revolution began with the slogan, "Land, Peace, Bread," and ended with the Ukrainian famine and the Gulag.