The Arabian breed is the purest breed in the world and oldest pure strain of horse. This ancient breed has been used to help formulate almost every known light horse breed in the world. 

The Morgan breed originated with a singular stallion named Figure (or Justin Morgan as he was better known).  This one stallion is thought to have been a sport, which is a horse that is unusually genetically strong with his characteristics

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For more than 100 years the Morgan / Arabian cross was utilized to build other breeds but it was not realized as a breed by itself

With the formation of the first Morab registry, increased awareness for the Morab began. Small groups and shows arose in the western regions and then throughout the Midwest which boasted the highest concentration of the breed. Now there are movements to establish good numbers of Morabs throughout the entire U.S.