Explain why many world powers developed extractive economies during the 1800s and why this was less important for the united states

The 1800’s is the time where Industrial Revolution was ongoing. Most world powers at that time, like Great Britain, Belgium, France, Japan, Sweden, Germany, and Japan, have strong industrial bases and so it is not right to say they have extractive economies. At that time, new advances in technology enabled production of machines, new chemicals, and production processes that enabled goods to be produced faster, cheaper, and with less manpower. At that time in the United States was rapidly expanding westward, acquiring huge quantity of excellent farmland and making high returns in agriculture. US would have to wait for the next century to fully industrialize.

isaac newton first proposed that earth was not perfectly round. instead, he suggested it was an oblate spheroid—a sphere that is squashed at its poles and swollen at the equator.

the idea of the earth being a flat disc is also inconsistent with the fact that a given lunar eclipse is only visible from half of the earth at a time. the only shape that casts a round shadow no matter which direction it is pointed is a sphere, and the ancient greeks deduced that this must mean the earth is spherical.

roosevelt believed that in light of the country's recent military successes, it was unnecessary to use force to achieve foreign policy goals, so long as the military could threaten force. this belief, and his strategy of “speaking softly and carrying a big stick,” shaped much of roosevelt's foreign policy.