What is it anyway you want done about population? What is it
ruby sparks in Northern Ireland, I in Austria, or
bilby and
DBT in Australia
can do about Uganda's total fertility rate of 5.6? Sure, we can fight anti-abortion bills and/or promote subsidised/free access to contraception where we live, and I'm all for it - though not because I'm scared of people, rather because I am deeply convinced that safe sex shouldn't be a privilege and that it's inhumane to force women to carry an unwanted pregnancy to term. But realistically, even you have to admit that the effect won't be more than shifting the TFR up or down by something on the order of 0.1 children per woman within the 1.3-2.0 range.
So back to Uganda. Sure, we can support charities that specifically focus on making contraception more available there and/or advertising the benefits of smaller families -
and we'd all agree on that. However, doing something right for the wrong reasons isn't always good enough. I'm in software. If a module I write produces correct output on my toy data and and I don't know it got there, I'm in deep shit: Chances are that it will blow up on real data, or, even worse, silently provide a wrong output without reporting an error. Before I went into software, I was in academia. Same thing there: Don't trust that your hypothesis is right because it passed that one test -- not before considering which alternative hypotheses might predict the same output, and carefully thinking about ways to differentiate between them. If you trust your hypothesis because it got one thing right, chances are that you're going to derive all the wrong conclusions for the rest of your life.
Alternatively, you could propose sanctions against countries with, say, a population growth rate above 1.5% (Uganda has 3.3) annually that don't implement a rigorous 1-child policy to bring it down. If the reason you're doing "promote easy access to contraception and fight cultural norms for very large families" is that you're scared of people, that's a likely next step if Uganda's TFR doesn't come down fast enough to your taste. Not only would I consider it unethical, what's worse, it is
likely to be counterproductive (even if limiting population growth is your declared goal). Cutting a population off from global trends and making its people poorer will, almost certainly,
increase, not decrease, birth rates. Here's an actual example: Iraq, which was internationally sanctioned for much of the last quarter of the 20th century, has almost twice the average TFR of its neighbours today (at 4.4; neighbours are: Iran at 1.7, Kuwait and Turkey at 2.0, Saudi Arabia at 2.5, Syria at 2.9, Jordan at 3.3, of which Iran and Turkey are the most populous by far).
And it
wasn't much different from its neighbours in 1990.