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First U.S. money never used the motto "IN GOD WE TRUST"
The original coinage minted by the United States never carried a religious motto. Interestingly, "MIND YOUR BUSINESS" (from Benjamin Franklin) appeared as the first motto (see below). The first American coinage appeared totally secular; as clean from a mention of god as the Constitution.
However, the religious community in America grew. At the time of pre-Civil War days, church membership had risen to 16 percent of the population (1850) and to 23 percent by 1860. From a desire to transform America into a Christian state, several Protestant denominations organized the National Reform Association which aimed to amend the Constitution to "declare the nation's allegiance to Jesus Christ." and to put a "legal basis" of the land on "Christian laws."
Although the National Reform Association failed in its attempt to amend the Constitution, it continued its efforts into the twentieth century. The National Reform Association attracted many powerful men in its ranks, including governors, Supreme Court Justices, and James Pollock who became the Director of the U.S. Mint.
Not until 1865 did the the religious motto appear on the first public issue coin (a bronze two-cent piece). Later in 1865, an Act to authorize the Coinage of Three-cent pieces, containing the motto, got passed. The Act of 1865 gave the authority to place "IN GOD WE TRUST" on coins.
In 1866 politicians put the motto on $5, $10, and $20 gold pieces, silver quarters, halves, dollars, and on the shield nickel, new in that year. They dropped it from the nickels, from the 1883 Liberty Head, until sculptor Felix Schlag placed it on the Jefferson nickel of 1938.
In 1908 Congress ignored the concept of state/church separation and considered a bill to make the use of the motto "IN GOD WE TRUST" a requirement of law.
The consideration served, of course, as more of a political polemic than a statement of fact. Congress had not specifically approved the motto until after the Civil war and only some coins had the motto imprinted on them. But on March 8, 1908, they passed the bill and made it a law.
On March 22, 1956, during the Christian anti-communist fever of McCarthyism, Congress passed a bill establishing "IN GOD WE TRUST" as a national motto.
Today, the religious motto defaces all of our paper and coinage, none of which appeared on our Founding Father's currency. Considering that Christians supposedly avoid the love of money, the "root of all evil" (1 Tim. 6:10 ), here we have a perfect example for justifying not only love for money but to place trust in a superstitious entity, the root of maleficence, if ever there existed