Is the fall of America connected to the predominance of Christianity, similar to the fall of Rome?

According to Osho, civilizations decline not from any single creed but from the “law of mediocrity”—repeating the same mistakes and clinging to half-truths. Religion flowers at peaks of luxury; when it becomes compensation for unmet basic needs, it degrades culture. America’s fate, like Rome’s, hinges on intelligent balance—bread and spirit—rather than on Christianity’s predominance itself.