It must not be supposed that the attitudes of the denominations toward each other were altogether those of mutual hostility and competition, or even of isolation. There was much of this, but there was also much of mutual respect and friendliness. From 1800 to about 1837 there was a noticeable increase of cooperation among the members of many denominations. This is seen in the earliest phases of Sunday school work, in Bible publication and distribution, in certain aspects of foreign and home missionary activity, and in the antislavery and temperance societies. But the most conspicuous feature of American Christianity continued to be its divided state.
One reason for this sectarian condition was that this was a free country. Under the First Amendment to the Constitution, which is the first article of the Bill of Rights, no church could ever receive special favors from the government nor could there be discrimination against any. When the American Government adopted this hands-off policy, leaving the whole matter of religion to the churches and to the people, the old compulsory unity disappeared--even the ghost of unity which England had, with its one national church and a number of "dissenting" bodies still under certain legal handicaps.
It is little wonder that America had many churches. Colonists had come from many countries bringing all the varieties of religion that existed in all those countries. Many of them had come as refugees from persecution. In later years, some divisions occurred on American soil, but the sects that were here in 1800 had all been imported from Europe.
Moreover, since the United States was formed by the union of thirteen colonies, the new nation, of course, had as many different churches as all the colonies together had had. In some colonies, especially Rhode Island, Pennsylvania, and Delaware, there had been a considerable variety of churches enjoying equal liberty. In others the situation was much as it was in England at the same time, with their established churches and with dissenting bodies existing as best they could under the shadow of the favored church. The founders and builders of the American colonies, with a few exceptions, had not believed in the separation of church and state or in equal liberty for all religious groups. But the idea of religious liberty had been growing, and the multiplicity of churches in the new nation made the establishment of any one of them as _the_ national church a practical impossibility. No one even suggested it in the Constitutional Convention of 1787.