The Silent Film Era Produced 10,000 Movies. The Vast Majority Have Been Lost Or Destroyed

Because early motion pictures were released on nitrate film, which is dangerously flammable and susceptible to decay—only to become even more flammable as it deteriorates—the majority of these films are no longer with us today. While the exact number of lost films is unknown, a study commissioned by the Library of Congress ballparks the surviving number at a scant 14 percent. – Smithsonian