American history introductory survey since 1877

The  answers should be in five paragraph essays that have an argument in the  form of a thesis and supports that argument. You should have an  intro/thesis, supporting paragraphs, and a conclusion. Make sure you  answer all parts of the question.

1)The US started as a series of European Colonies. From what you  learned in AMH2020 would you say that the US is still an extension of  Europe or does it have its own cultural identity? Are we now a separate  ethnic group?

2)Looking at the major moments in US History after the Civil War what is the most defining moment in American History? How did it impact the  US positively? It has to be from the Reconstruction to 2018.