Tariffs were so important because they caused imported goods to cost more, which made more Americans buy things locally. This helped the industry to grow, and the goods exported to be more abundant than the goods imported.
Hope I helped :)
Nationalism created a standoff between countries trying to prove who was better. This increased tension boiled over until Archdule Franz Ferdinand was killed.
No because, if were all the same, were human and it wouldn't be fair to add extra on because a person needs a little extra space, espically cause there weight.