In 1883, it was the "railroad industry" that was responsible for creating the first system of time zones in the United States, since the introduction of rail travel meant that there needed to be a set table of departure and arrival times across the US.
The Dred Scott vs. Sandford case was monumental in America, as it stated that slaves had no rights which their owners were bound to respect. Along with this, it also stated that slaves are property and can be brought into free states.
This case causes significant divide between the nation. The southern states and those individuals with slaves see this as a victory, as they can now take their slaves wherever they want without the fear of these individuals becoming free men. On the other hand, abolitionists and states who outlawed slavery are furious. This is because they now have to allow slave owners to keep their slaves in a state where they do not want slavery. This case resulted in a bigger divide between those for slavery and those against slavery.
The imperialism had a massive effect on Europe, especially its western part. The countries that were imperial powers managed to get hold onto territories all over the world. By managing to control these territories, the imperialists had lot of natural resources and very cheap labor force at disposal. This enabled the industry in Europe to have constant growth, and the manufacturing to skyrocket, thus there were more and more products for the market, and more and more wealth was coming because of it, resulting in strong and well developed countries in Western Europe.
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