By definition, this issue only applies to non-white "human weeds." Margaret Sanger's heirs focus a lot of their abortion "service" marketing on minority communities, in faithfulness to her eugenics vision. The irony is -- the sword she forged to wield against the "lesser breeds" has decimated the liberal sophisticates.
Interesting point, Tom! The "religious fanatics" (us! ... and the Moslems) and the immigrants are still having children, while the "superior" types are disappearing from the landscape.
And I have to object to the "both parents must work" and "can't afford a large family" explanations. I know too many large families with one income (including us) to buy into that. They don't have everything the people with two jobs and one child have, but we all have homes, vans :-), food and clothing, zoo memberships, books for our kids, college scholarships when it's time for college ...
I sympathize, though, with the people who think it's impossible, because often a couple doesn't know anyone with more than two children. I was fortunate during a critical time, when we had our girl and boy and everyone expected us to be "done," to meet families with 6, 8, or 10 children who were happy and comfortable.
Three children is the hardest; after that it gets easier. I'm looking forward to having a full "staff" of 10, before I retire from the Baby Thing!