Optimizer said:
About Birth Control as it is
Population increase in a civilization with Birth Control is be slightly smaller, because the MilitaryFoodProduction flag, which converts the food surplus into production when military units are trained. (This bonus can be interpreted as emancipated women serving in armed forces and military contraction instead of raising more children.)
The Great People birth rate does not represent how often Great Babies are delivered, but rather how often children reach adulthood with the right heredity and environment to be Great. And I believe that a society with birth control and equal opportunities will provide the environment to many more boys and girls than a patriarchal society where contraception is forbidden.
At the risk of triggering a flamewar, you can't possibly know that. Firstly, widespread contraception is a relatively recent phenomenon. The "pill" made its debut less than 50 years ago:
http://en.wikipedia.org/wiki/Birth_control_pills
Sure, there were contraceptive methods available before that, but they were unreliable, dangerous, or both.
(Not that the "pill" is perfect ... but that would really trigger a flamewar, so let's not go there.)
Any way you look at it, that's
way too short a timespan to be making the sorts of claims that you make above. You may believe that birth control does all of those things, but you'll have a heck of a time proving any of it.
Secondly, you seem to have confused birth control with gender equality. While many people believe that contraception is required for gender equality, many
other people disagree. A truly feminist society would be more inclined to support pregnancy and childbirth. This was the opinion of many of the early feminists, including Susan B. Anthony, Alice Paul, and Elizabeth Cady Stanton. For more details, see:
http://www.feministsforlife.org/history/index.htm
Thirdly, in your argument for increasing Great People, you also seem to have confused birth control with education, nutrition, and many of the other advantages of being born in the modern era. Even if it were possible to somehow stuff the genie back into its bottle (which it isn't), taking away birth control would not necessarily remove anyone's opportunity to become Great.
Fourthly, I'm not even convinced that the modern era has any significant advantages in Great People terms. Yeah, the average Joe (or Jane, if you prefer) in a developed country is more healthy these days, and that's worth something, but our actual education is sliding backwards. Have we really had more Great Artists, Great Engineers, or Great Anybodies than we had in the past? There are many advantages to modern civilization (the Internet, for example), and I'm not trying to knock it, but I just don't see these Great People all over the place....
Optimizer said:
About Birth Control more generally
As always, we have the dilemma between realism and strategic depth. Civ needs both to be Civ. (If you want plain realism, go watch the History Channel. If you want plain strategy, go play chess.)
Birth control should be represented when it comes to gender, and it should - like all civics - have effects balanced to be a good choice at some occasions and a bad choice otherwise.
One problem is that population increase has always been good in Civ. Though a new-born citizen will be tied up as unhappy (or as an entertainer in Civ 1-3) , they can be useful later. Therefore we have to provide some good and relevant advantages to Birth Control to offset the low population increase.
I like your quote about realism and strategy.
Your point about population increase is absolutely true. More people are always a good thing, especially when viewed in the long-term. This is one of those areas in which Civ has gotten it exactly correct.