 Moreover, Stein points to another consideration that speaks against psychic determinism. After all, whether or not a “given state is exactly determined by the series of preceding ones and can be measured” depends on whether there is something “other than merely causal factors” at play (1922: 30[32]). Indeed, a large part of Beiträge is devoted to exploring these other factors and their interplay with the psychic and spiritual states of individuals. Specifically, “the life of the psyche [is] the result of the interplay of different types of powers” (1922: 99[115]). Roughly, these are: (1) sensate and (2) spiritual life-powers, (3) the various motivational and non-motivational powers resulting from drives, strivings, impulses, inclinations, intentions, as well as cognitive, evaluative and volitional “stances” (Stellungnahmen), (4) the will-power of autonomous individuals, and (5) the motivational forces of the spiritual domain and the laws of reason. Let us summarize their different roles and functions vis-à-vis the constitution and the determination of psychic and mental life.