In the given time frame from 1700 to 1790 the population of England and Wales did not decreased at all, on contrary, the population in England and Wales actually was rising steadily, and by the end of this period there was a fast increase in the population, similar to the ''baby boom'' period few centuries afterwards.
because it had no power to tax or regulate trade
The United States took control of the Philippines from Spain.
I hope this helped! sorry for the late answer.
They gained a lot and it helped