The shares of Social Security benefits subject to the individual income tax have grown rapidly since 1984, when benefits first became taxable. Initially, no more than 50 percent of benefits were subject to tax for higher-income taxpayers, and all of those taxes were credited to the Social Security trust funds.
The effect of the attack of Pearl Harbor was that it forced the U.S. into a war with Japan; a war that ended in the unleashing of the worlds first, and hopefully last, use of a nuclear bomb in an attempt to defeat an enemy.
Answer     Japan's attack on Pearl Harbor had a dramatic effect on the European war. President Roosevelt had wanted America involved in the European war for somâ¦e time, but the American people were against it. After World War I they were wary of entangling themselves in European wars.