According to Theodore Dreiser, what is the core of American valu

According to Theodore Dreiser, what is the core of American values? And what is their effect on people's life?
【正确答案】：From his first novel Sister Carrie on. Dreiser set himself to project the American values for what he had found them to be - materialistic to the core. Living in such a society with such valte system, the human individual is obsessed with a never-ending. yet meaningless search for satisfaction of his desires.