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.
As a result, Congress passed, and the states ratified, the 16th Amendment, giving Congress the power to levy income taxes. The amendment allowed Woodrow Wilson to sign the Revenue Act of 1913 into law, establishing a progressive income tax.