TL;DR - Second wave feminism encourages a lifestyle that results in decreased times of fertility spent in a place conducive to child-rearing. This, literally, spells the death of a society, as not enough children are born to replace the dying elderly.

(First post, I think, so if I did something wrong, just let me know and I'll update.)

Feminism

First wave feminism was concerned with legal equality. Voting and property ownership were the typical results of this movement. The second wave of feminism focused on female liberation from marriage and greater workplace participation. No fault divorce, the CC, and laws against discrimination in hiring/firing of protected classes of individuals came out of this phase. Finally, third wave feminism has been an attempt to liberate women from negative emotions. This is the phase that has allowed so many false rape allegations. If sex felt bad after the fact, just call your local PD and ruin his life!

Focusing on the second phase, liberating women from the permanence of marriage has allowed them to be far more selfish in how they treat their husbands. If he wants kids, just divorce him (and get a nice payday as a bonus if you've been married a few years). Obviously, The Wall may have other things to say about her post-divorce success, but if she got married at 27 (the average age of marriage) she probably has zero first hand experience with her decreased SMV. She will divorce expecting a similar level of success as when she had zero wrinkles and (relatively) perky everything.

The past forty years have also pounded into women that they have almost a moral obligation to pursue a career. Certainly, it tells them that life will be far better if they do so.

Fertility

A woman's fertility typically begins to seriously decline around 35. So, if a woman has spent her 20's on the CC, got married around 27, divorced a few years later, and finally remarried at 33, she'll typically have a decade at most to have a decent chance at having healthy children.

Decreased Birth Rate

Thus, the model female life pushed by second wave feminism will literally kill a society, as birth rates will plummet due to a decreased period of fertility spent in an atmosphere conducive to having children.

The aging of Western societies is exhibit A confirming the truth to this prediction. Every. Single. One. of them is facing the problem of a national pension system that depends on having a large pool of young labor that doesn't exist anymore.

Objections

Some, I'm sure, will point to the ineffectiveness of modern education in America at training productive employees and the mounting debt that college brings as alternate roadblocks to achieving the financial stability needed to have comfortably support children. This has two problems. First, the demographic shift I described is already here. For this change in population to be current trouble would require around two generations. Gen1 doesn't have enough kids around age 20-30 to support them in retirement. They continue to work until their sixties, which is another generation's time period. Finally, 30 years later, Gen1 begins to retire only to find no young people to pay for Social Security/Medicare. Education and particularly college debt have only been issues for about 15 years now. For education to be the root of the current state of demographics, its problems would have to have been present 45-55 years ago, when Gen1 was in school!!

Secondly, even if they did extend that far back, when do women even start thinking about children nowadays? Late-twenties. Before then, society's narrative tells them to avoid the topic altogether. If she's twenty-one and pregnant, even in family oriented circles like churches (first-hand experience), it's suspected that mistakes were made.

Conclusion

The ironic thing is that women really do need to have these options for a peaceful society to exist. Divorce rape and children aside, women shouldn't be coerced into staying in an arrangement they no longer find beneficial. Furthermore, if they want to pursue a career, more power to them.

The real mistake came when men failed to communicate to their younger counterparts the laws of female attraction, the truths of pair-bonding, the reality of child bearing, and what real benefits a good (supportive, wants to have kids, take care of the house, etc.) wife brings. Furthermore, they did not even give their sons permission to take a stand for what they want. Instead, they were told that her past is past, creating a society with zero consquences for the truly catastrophic life styles most women live nowadays.

Thus, women have internaized a worldview that sees no personal consequences for the AF;BB lifestyle, because in a certain sense there aren't any, and we are now living in perhaps its most deadly corollary: a vanishing youth to support the elderly and carry on the values that made female liberation possible in the first place.

So, if there's a takeaway from all this, it's to teach the young men in your sphere of influence about how to stand up for themselves in relationships and that sluts will slut. It is only through this that we can hope to see any of the trends described here to reverse.