A nation can neither be Christian nor Infidel — a nation is incapable of having opinions upon these subjects. If a nation is Christian, will all the citizens go to heaven? If it is not, will they all be damned? Of course it is admitted that the majority of citizens composing a nation may believe or disbelieve, and they may call the nation what they please. A nation is a corporation. To repeat a familiar saying, “it has no soul.” There can be no such thing as a Christian corporation. Several Christians may form a corporation, but it can hardly be said that the corporation thus formed was included in the atonement. For instance: Seven Christians form a corporation — that is to say, there are seven natural persons and one artificial — can it be said that there are eight souls to be saved?
Robert Green Ingersoll – “God in the Constitution”