Give a brief answer to each of the following questions in English.How did Theodore Dreiser contribute to the American literature through his literary creation?

Give a brief answer to each of the following questions in English.How did Theodore Dreiser contribute to the American literature through his literary creation?

HE BROKE AWAY FROM THE GENTEEL TRADITION OF LITERATURE AND DRAMATIZED THE LIFE IN A VERY REALISTIC WAY. THERE IS NO COMMENT，NO JUDGMENT BUT FACTS OF LIFE IN THE STORIES . HIS STYLE IS NOT POLISHED BUT VERY SERIOUS AND WELL CALCULATED TO ACHIEVE THE THEMATIC ENDS HE SOUGHT .