How was the film "Within Our Gates 1920" influenced by U.S culture at the time it was created? (Answer carefully if the film was created long after the events portrayed)

Oscar Micheaux was a renowned African-American filmmaker and an eminent entrepreneur. He was among the significant figures in the antiquity of African Americans known for his filmmaking during the era of silent and early sound filmmaking. In his whole career, he directed almost 40 films and attained the title of being the most productive and independent filmmaker during the era. He incorporated themes such as racial injustice, discrimination, and the social injustice faced by the African-American populace.