D. w. griffith transformed the into an art and unlocked its potential as a medium of serious expression and persuasion with his controversial film the birth of a nation. while critics praised the film for its narrative complexity and epic scope, many others were outraged and even started riots at several screenings because of its highly controversial, openly racist attitudes.

Cinematography

Explanation:

The Birth of a Nation was a pivotal work in American film history. At the time, it was the longest and more technically complex film, even getting to be privately screened to president Woodrow Wilson.

However, this epic scope and technical improvement were obscured due to the blatantly racist view of the plot, and the oversimplification of the dynamicsof the Reconstruction Era, portraying the pro Reconstruction  parties, particularly blacks, as lazy, non-compliant individuals, filled with lust and envy towards whites, creatures that needed to be punished by the Clansmen.

very positive impact on our industries in the west, sine they promoted settlement and increased the ways in which goods could be transported to market.