The perspective suggests that a large number of variables and factors are responsible for behavior or choices to behave in certain ways. The variables and factors accumulate during the course of an individual’s life, in various “sizes” and “weights.” This accumulation creates the life-shape of any individual. The concept of weight is one of the essential elements of the perspective. The presence of a variable is less important than the weight of variables required to produce a behavior or a behavioral choice. Weight suggests that a critical point may be reached by the addition of any variable that results in the cumulative achievement of a critical point. The earlier discussion of patterns in life-shapes implied that there may be specific variables and factors that exist, and have effect, as a group. The term “critical point” has been used in previous commentary but with only a general definition of what it means.