Why did Osama bin Laden declare war on the United States?

Because United States sucks

In Osama bin Laden's November 2002 "Letter to America",[3][4] he explicitly stated that al-Qaeda's motives for their attacks include: Western support for attacking Muslims in Somalia, supporting Russian atrocities against Muslims in Chechnya, supporting the Indian oppression against Muslims in Kashmir, the Jewish aggression against Muslims in Lebanon, the presence of US troops in Saudi Arabia,[4][5][6] US support of Israel,[7][8] and sanctions against Iraq.[9]

Explanation:

the best description of postwar writers might be progressive.

following the war, writers showed a tendency to work on artistic or social matters rather than political themes. while postwar literature may not have been the greatest period of english literature, the themes provided excellent critics a high number of novels. such examples include anthony burgess, anthony powell and frank kermode, all of which can be placed under the progressive view.