When did the free-for-all start? I'm thinking with easy access to birth control. That's when sexual relations for so many became a game with no consequences.
JMHO
While Pope Leo XIII warned against what he saw coming in 1899, the most direct link to the slide becoming an avalanche is in 1965 when Fr. Hesburgh of Notre Dame made a deal with the Rockefeller Foundation to hold a series of secret conferences with Planned Parenthood.
Once you separate the sex from procreation, there's no clear cut line between homosexual sex and normal heterosexual sex.
I’m thinking with easy access to birth control.
Yep, you got it right.
the Church is not a moral voice of authority when it’s so desperately needed.
Well, it still is, if one consults dogma and doctrine, but certainly not by example of many of the clergy.