Russell's first prediction was for 1874, IIRC (correct me with the proper year if memory is faulty). Nothing happened then. Eventually that date was replaced by 1914. And nothing happened then*, either. A world war where most of the world's population survived isn't the destruction of the world's nations in Armageddon, succeeded by God's eternal kingdom on Earth. That was what Russell predicted for 1874; it was what he predicted for 1914. It didn't happen either time.
* Not what he was predicting, anyway.