Garidian

Garidians are a humanoid species native to Garid, a planet located in the Romulan Star Empire. The Garidians are allied with the Romulans, and will even share technology (ie. starships) The Garidians have earned a reputation as honorable warriors and do not usually resort to trickery.

Society
Garidian society is split into two classes; Patricians (the upper class)and Plebians (the lower class). The structure of the society is based on the four scrolls written by the Lawgiver one thousand years prior to the 2360's. The first scroll defines the Garidians' code of honor. The second defines the relationship between the military and the government. The third scroll outlines the Garidians' religion. Finally, the fourth scroll defines the privileges and responsibilities of the Patrician class.

The Fifth Scroll
Garidian legend states that the Lawgiver also wrote a fifth scroll that outlined the rights and privileges of the Plebian class. However, the Patricians forced the Lawgiver and his followers to flee Garid, before he could reveal his fifth scroll. The Plebian-born social revolutionary, Lucana, believed that if she found the fifth scroll it could cause the oppressed lower class to rebel against their Patrician masters.

(Star Trek: The Next Generation - A Final Unity)