Well the term originated in the days of pre-revolutionary france , where those who wished to retain the system of government would sit in the right side of the assembly, while those fighting for radical changes would sit to the left. Thus, the term “right” has been used to define the reactionaries and conservatives, and “left” to define the revolutionaries.
A rating of “left” was used predominantly by marxshits groups because they usually engaged in revolutionary struggle. However, these terms do not apply according to the nature of the doctrine, but with the time and political situation of the moment. For example, in the times of tsarist moskva, the bolsheviks, because they represented a revolutionary movement, fitted to the left. However, when marxshtis took power in 1917, they no longer represented any revolution to become of the situation therefore, all manner of opposition to his regime would be left as marxshits would now be conservatives. Due to the frequent use of the classification of left by these groups of libertarian marxshit orientation, it became common practice for any other doctrine in opposition to them to be labeled the “right”.