With a POD after 1800, get the population of the United States of America to 1 billion citizens by 2004. If you think you have to, you can conquer Canada and/or Mexico, but nothing else. Other than the population change, the US should be fairly similar (no communist or facist regimes, or coups, America should still be a superpower, etc.).
A few ideas:
1) Congress doesn't abolish the slave trade, so more slaves are imported, which, of course, lead to more citizens by our time.
2) Much more immigration. Maybe the 19th century isn't so peaceful for Europe, so people have even more reason to move to the US.
3) Outlaw abortion. This should give us a few more million people.
A few ideas:
1) Congress doesn't abolish the slave trade, so more slaves are imported, which, of course, lead to more citizens by our time.
2) Much more immigration. Maybe the 19th century isn't so peaceful for Europe, so people have even more reason to move to the US.
3) Outlaw abortion. This should give us a few more million people.