Why did the hub of film production in the USA move from the east coat to the west coast?

There were less copyright laws on the west coast of the USA.

Which nations film industry does Cousin’s describe as “the best in the world” in the 1910’s and why?

Scandinavia, Denmark because they used light effectively.

Give an example of two films and two directors from this place and time cited by cousin’s as remarkable.

Haxan by Benjamin Christensen

Ingeborg Holm, Victor Sjöström

Who directed Birth of a Nation and why are opinions so divided on it.

D. W. Griffith. The film was very racist and influenced white supremacists but was technically well made.