If equality wins (socialism) then the country goes to hell. Unfortunately D’ Tocqueville predicted as much and we can say that society (regardless of what party is in power) is becoming more liberal or socialist.
A lot of things work toward that end: 1) Death of God, which means more relativism and a concentration on self. No transcendent values means more temptation for doing evil and more irrational acts that you don’t have to account for in the afterlife. You are the sole arbitrator of your fate and this concentration on self (ego and desires) means more pleasure and no responsibility — no responsibility for creating a better future for society. Pleasure and no responsibility mean no kids to inherit that future. Kids take the focus off the self. The central concerns are: where do I shop, where can I vacation to, what are my pensions, etc. In other words, socialist Europe without kids.
Another force that works toward a socialist/nihilist end: 2) Society is rich and romantic. Wealth leads to romanticism, that is to say, we can afford having ludicrous ideals. Transgender washrooms are a serious question in life! As well, now that God is out of the question, man has the presumptuous arrogance and belief in his power to create his own world utopia. Our progressive society doesn’t learn the hard lessons from the past because, in great part, it concentrates on feeling good, feeling virtuous and the lessons of the past dampens those feelings. To make matters worse free thought is not encouraged in university — it’s all about not feeling hurt and collective group think.
In the end, things don’t look optimistic. But there are forces out there that are reacting against the madness. My solution is take a metaphorical flamethrower to the universities because they are the bastion of the left. It all comes from there and infiltrates every walk of life and government. The university has become its nemesis: it’s become irrational. Education now means indoctrination. Perhaps western society doesn’t have to fall if it has the wisdom to turn itself around.
True, but now modern Europe is "Europe without kids". The fertility rate for native Euro couples has dropped to about 1.5 to 1.7 -- for many reasons but among them is the high taxation (they feel they can't afford to raise kids because their taxes support the retiring Boomers and generous social programs), and the sky-high abortion rate (low moral barriers to the use of abortion as birth control -- as you said due to the decline of religious values).
You really hit the nail on the head pointing out that idle affluence breeds romanticism, complacency, narcissism and nihilism. Some would argue this period of ingratitude started with Dr. Spock in the 60's. Now the first wave of those people are in power, especially on the left side of the political spectrum.