From http://www.millon.net/content/evo_theory.htm#model

Existence: The Pleasure-Pain Polarity.

The first phase, existence, concerns the maintenance of integrative phenomena, whether nuclear particle, virus, or human being, against the background of entropic decompensation. Evolutionary mechanisms derived from this stage regard life-enhancement and life-preservation. The former are concerned with orienting individuals toward enhancing survival and improvement in the quality of life; the latter with orienting individuals away from actions or environments that decrease the quality of life, or jeopardize existence itself. These may be called existential aims. At the human level of functioning such aims form, phenomenologically or metaphorically , a pleasure-pain polarity.
Adaptation: The Active-Passive Polarity.

To exist is but an initial survival phase. Once an integrative structure exists, it must maintain its existence through exchanges of energy and information with its environment. The second evolutionary stage relates to what is termed Modes of Adaptation; it is also framed as a two-part polarity, a passive orientation, that is a tendency to accommodate to one's ecological niche, versus an active orientation, that is a tendency to modify or intervene in one's surrounds. These modes of adaptation differ from the first phase of evolution, in that they relate to how that which exists is able to endure or continue to survive in its environment.
Replication: The Self-Other Polarity.

Although organisms may be well-adapted to their environments, the existence of all life-forms is time-limited. To circumvent this limitation, organisms have developed Replication Strategies, that is, ways in which to leave progeny. These strategies reflect what biologists have referred to as r- or self-propagating strategy, at one polar extreme, and K- or other-nurturing strategy, at the other extreme. Psychologically, the former strategy is disposed toward actions which maximize self-reproduction;; here, organisms are egotistic, insensitive, inconsiderate, and socially uncaring; while the latter strategy is disposed toward protecting and sustaining kin or progeny; this leads to actions which are socially affiliative, intimate, caring, and solicitous.
posted by Lloyd at 2:24 PM