Abraham Lincoln came into office a bit prior to the civil war and remained in office until past the end of it until he was assassinated.
The Mayans met their demise when the Spanish conquered the Mayan with the combination of superior technology and the introduction of foreign diseases. Foreign diseases such as smallpox weakened populations and were thus easier to subdue.
The First amendment is perhaps the most important part of the Bill of Rights It protects five of the most basic liberties. They are freedom of religion, freedom of speech, freedom of the press, freedom of assembly, and freedom to petition the government to right wrongs.
The Industrial Revolution involved a shift in the United States from manual labor-based industry to more technical and machine-based manufacturing. It also paved the way for many manufacturers.