What was the phrase that was coined by Herbert Spencer to describe only the fittest societies surviving over time, thus upgrading the world as a whole?.

How did the battle of okinawa affect president truman’s decision to use the atomic bomb against japan? it showed that japan was close to surrendering. it showed that the us could not win the war without it. it showed that japan was willing to fight to the end. it showed the us could easily defeat japan.

An effect of the steamboat's popularity was that fewer people traveled by rail. o steam locomotives became less popular. people began to build canals in the united states and europe. o more people began to travel between the united states and europe.

The economic and the political influence of the united states in haiti was more powerful than the influence of any other country.