What are the important aspects that contributed to Giselle?

Ballet history; Presentation on answering the question: What are the important aspects that contributed to Giselle?

-Have to have concise and strong argumentative thesis to answer the question. (no facts)
{answer -so what, why}
– 3-4 main points to prove the argumentative thesis
– Examples/conceptes to add as details : La Sylphide, Louis XIV, Nouverre (Ballet d’ Action), Blasis
– Other details to back up the points