evolve - undergo development or evolution; Modern man evolved a long time ago speciate, differentiate, specialise, specialize - evolve so as to lead to a new species or develop in a way most suited to the environment. derive - come from; The present name derives from an older form
The Sixteenth Amendment (Amendment XVI) to the United States Constitution allows the Congress to levy an income tax without apportioning it among the states or basing it on Census results.
In 1913, the 16th Amendment to the Constitution made the income tax a permanent fixture in the U.S. tax system. The amendment gave Congress legal authority to tax income and resulted in a revenue law that taxed incomes of both individuals and corporations. In fiscal year 1918, annual internal revenue collections for the first time passed the billion-dollar mark, rising to $5.4 billion by 1920.