1910s: The experience of World War I forever changes the way Americans feel about their position in the world. Never having been involved in a conflict of this magnitude, Americans feel patriotic but also disillusioned and fearful.

Today: In 2001, terrorists attack the World Trade Center towers in New York City and the Pentagon in Washington, D.C. These attacks on American soil leave Americans feeling disillusioned and fearful but also patriotic and united.

1910s: There is not yet a comprehensive linguistic history of the United States. Although the topic has received attention and study over the years, no one has compiled all data into a single volume.

Today: Mencken's The American Language is considered one of the most informative and thorough treatments of American linguistics. The field has broadened, and books are available containing up-to-date terms, slang, and influences. To date, however, no other author...