On every issue there are people who want to move in a particular direction, and generally it is true that there is a majority that is happy with the way things are.
Back when we first started writing down ideas, codifying the world as we saw it, the world was ruled by divine right. Kings, Czars and Emperors abounded, all of them claiming to have their power because god granted it to them. But the people at the bottom of the chain of power suffered horribly and died for want of even basic care; food, water and shelter could be and were denied to them by the more powerful amongst them.
Many excuses were made for why this was so, but in the end the people in the middle of the chain came to believe that the suffering of the bottom could be alleviated by sharing the wealth present at the top. To this end, they began to cause trouble. They started providing care for the less-well-off (the dreaded poor these days) educating the lower classes about the wealth available to the upper classes because of the combined efforts of the group as a whole.
When enough of them understood their plight, and the artificial nature of it, they began to form together as groups, pressing their rulers to provide to them some of the benefits that the rulers enjoyed. Through the ages, forums and then parliaments were formed, attempting to gather to themselves some of the power held by the rulers. As this form became more common and more powerful, it just so happened that the supporters of the king happened to be sitting on the right side, whereas the people demanding change, more power (the liberalizing influence) were sitting on the left.
Left has always been the side of darkness. Most people are right handed, while those who are left-handed are seen as peculiar (Sinister is another name for the left side) it is seen to be proper that the right hand be dominate. At earlier times in history, left-handed children were forced to use their right hand until it became dominant to all external appearances. To this day left-handed people die younger, generally of injury inflicted by tools and machines created in a right-handed world.
So it was probably not by chance that the supporters of the king were seated on the right side, the correct side, of the aisle. After all, supporting god and king was the way to be in those days. However history has progressed, and kings are almost extinct. Where they still exist in the civilized world they retain a figurehead status with no real authority beyond the title they hold. Where they exist in the rest of the world, they are no better or worse than other people. Tending toward dictatorship in the more perverse, and benevolent father in the more enlightened.
However the verbiage of Left and Right remain; the Left being those who generally wish to change the status quo, and the Right being the group which favors the way things are or even better were.
Except that memory is flawed. The way things were never was; or only was because of elements or structures which no longer exist. The way things were relied upon variables which ceased to be, and so the way things were cannot be re-established.
There are other words for those who want things to stay the same. When they do so because they fear change, the word is coward. When they do so because they cannot see that change has already occurred it is called delusional. It is only when change will make things demonstrably worse is that word prudence, or caution. It is only then that the second definition of right (to be correct) applies here.
The changes which are forcing themselves upon us through technology and an imperfect understanding of the closed system which is our habitation known as the Earth are inevitable. We cannot deny their occurrence because reality will assert itself until it kills us all if we do not admit that change has occurred. The changes which we can afford but are being resisted (universal healthcare as one glaring example) will occur either now, or at greater cost in the future.
So today, now, the Right are not right they are simply right, as in seated in the section reserved for those who are in love with the past in an demonstrably unhealthy fashion. Creepy.