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.
16th Amendment Forward: In 1913, with World War I looming, ratification of the 16th Amendment permanently established the income tax. The amendment gave Congress the authority to impose a tax on the income earned by both individuals and corporations. By 1918, government revenue generated from the income tax exceeded $1 billion for the first time, and topped $5 billion by 1920. The introduction of the mandatory withholding tax on employee wages in 1943 increased tax revenue to almost $45 billion by 1945.