History of 'In God We Trust' (treasury.gov)

Actially at the beginning was 'In Gold We Trust' but a letter got lost in the process.

All Others Pay Cash?

I always find it ironic that we started with "E pluribus unum" ("Out of many, one") a uniting statement and added "In God We Trust" a dividing one.

Same goes for the Pledge of Allegiance "Under God" added just before "indivisible".

Both being formalized in the 1950's.