As to "isms", I feel that I should offer definitions of the terms objective and subjective (as "isms").
Per the Ayn Rand Lexicon:
Objectivism holds that:
1) Reality exists as an objective absolute—facts are facts, independent of man’s feelings, wishes, hopes or fears.
2) Reason (the faculty which identifies and integrates the material provided by man’s senses) is man’s only means of perceiving reality, his only source of knowledge, his only guide to action, and his basic means of survival.
3) Man—every man—is an end in himself, not the means to the ends of others. He must exist for his own sake, neither sacrificing himself to others nor sacrificing others to himself. The pursuit of his own rational self-interest and of his own happiness is the highest moral purpose of his life.
4) The ideal political-economic system is laissez-faire capitalism. It is a system where men deal with one another, not as victims and executioners, nor as masters and slaves, but as traders, by free, voluntary exchange to mutual benefit. It is a system where no man may obtain any values from others by resorting to physical force, and no man may initiate the use of physical force against others. The government acts only as a policeman that protects man’s rights; it uses physical force only in retaliation and only against those who initiate its use, such as criminals or foreign invaders. In a system of full capitalism, there should be (but, historically, has not yet been) a complete separation of state and economics, in the same way and for the same reasons as the separation of state and church.
And its opposite per the same Lexicon: Subjectivism
Subjectivism is the belief that reality is not a firm absolute, but a fluid, plastic, indeterminate realm which can be altered, in whole or in part, by the consciousness of the perceiver—i.e., by his feelings, wishes or whims. It is the doctrine which holds that man—an entity of a specific nature, dealing with a universe of a specific nature—can, somehow, live, act and achieve his goals apart from and/or in contradiction to the facts of reality, i.e., apart from and/or in contradiction to his own nature and the nature of the universe. (This is the “mixed,” moderate or middle-of-the-road version of subjectivism. Pure or “extreme” subjectivism does not recognize the concept of identity, i.e., the fact that man or the universe or anything possesses a specific nature.)
My additions to this:
Objectivism recognizes the least common denominator for mankind as defined by the concept of and the full recognition of "I". As in "I built that" (and therefore I own it).
Subjectivism contends that "we" is the least common denominator for mankind, and therefore "you didn't build that" (because "we" did, and therefore we really own it)
Objectivism recognizes the full sovereignty of the individual (the identity, or the "I"). The "I" is fundamentally good provided that it is pursuing it's own rational self-interest and is neither sacrificing to others or sacrificing others to itself.
Subjectivism recognizes the full sovereignty of anything other than the individual. This recognition is usually granted to a god or the collective or the state or a supreme leader (who is effectively both a god and the state). The "I" apart from the collective is fundamentally evil and/or sinful in any such system, and therefore must be either enslaved by, or controlled and regulated by, or sacrificed upon the alter of the "we" (or the collective, be it mind, god, dictator, or state).http://principlesofafreesociety.com/objective-laws/