A similar argument has been used to explain why religious groups that oppose having children die out fairly quickly. But in the case of American politics, those making the argument assume that the American two-party system will still exist in the timeframe 30-100 years, and further that abortion will still be the primary political topic in a generation or three. The last assumption is ridiculous. And we haven't even considered that new generations often discard important values from the old.
There are certainly lots of assumptions, but it might be valid for the first generation that has already passed. This is borne out in population growth numbers by state.
I linked to this mainly because I find it interesting, not because I believe it.
A similar argument has been used to explain why religious groups that oppose having children die out fairly quickly. But in the case of American politics, those making the argument assume that the American two-party system will still exist in the timeframe 30-100 years, and further that abortion will still be the primary political topic in a generation or three. The last assumption is ridiculous. And we haven't even considered that new generations often discard important values from the old.