Profile America — Monday, February 3rd. It may be hard to credit but there used to be a time when the public sphere wasn't filled with squabbling about income tax rates. The familiar noise began 100 years ago today, when the 16th Amendment to the Constitution was ratified, authorizing Congress to levy taxes on income. In its first two years, the tax was modest, affecting only a very few citizens and provided only a small part of the government's total revenue. But the need to fund our involvement in World War I moved income taxes to the center of federal finances. In 2011, individuals paid around $1.7 trillion in federal income tax, while state and local income taxes amounted to $114 billion in just the second quarter alone of 2013. You can find more facts about America from the U.S. Census Bureau, online at <www.census.gov>.