I agree w/ Newbie. Plus, a “one vs. two” argument doesn’t make a lot of sense: A second child isn’t going to consume so much that w/out him the first child would have “lots” to eat, but w/ him neither would have enough. A better question would be is it better to have one or two kids who will be physically well provided for (food, clothes, housing, education, etc.), or 5 or more who will not be as well provided for, physically (i.e, will have to wear hand me downs & 2nd hand clothes, public (or home) schooled instead of private, pay their own way to college, more modest house, share rooms, buy “warehouse” foods, not eat out, etc). If one more child is going to send the family into extreme poverty (where literally no one will have enough to eat), then I would say it is better to care properly for the children already born than try to add more (and I believe the Church considers this a justifiable reason for a couple to avoid a pregnancy).
In Christ,
Ellen