Psychologists also deal with issues of will; some people are highly intrinsically motivated and do whatever seems best to them, while others are “weak-willed” and easily suggestible (extrinsicly motivated) by society or outward inducement. They also study the phenomenon of Akrasia, wherein people seemingly act against their best interests and know that they are doing so (for instance, restarting cigarette smoking after having intellectually decided to quit). Advocates of Sigmund Freud’s psychology stress the importance of the influence of the unconscious mind upon the apparent conscious exercise of will.
The sociologist Ferdinand Tönnies, in analysing group psychology, distinguishes between will directed at furthering the interests of the group (Wesenwille or “essential will”), and will directed at furthering individual goals (Kürwille or “arbitrary will”).