 His institute was the first in the United States to produce a diphtheria antitoxin.Writing in the "North American review" Gibier advanced the view that the medical "priest" should lead the movement from "sentimental" to "scientific" religion.He thought that only the doctor could diagnose diseases such as socialism and anarchy, and that with his knowledge of genetics he could "contribute to the purification of the race" through marriage counseling.