The will to live as an indicator of Well-Being and predictor of survival in old age

The will to live (WTL) is presented in this chapter as an important indicator of general well-being due to its diagnostic and prognostic value. Conceptually, the WTL is defined as the psychological expression of a natural instinct of human beings – the striving for life, which is comprised of rational and irrational components, and can be self-assessed. The WTL can be measured by a single item or by four- and five-item scales. All three tools showed good psychometric characteristics and generated similar results in four large-scale studies of elderly Israelis, two of which used a longitudinal design. The WTL was also a powerful predictor of long-term survival among old women. Conceptually, considering that the WTL not only expresses a state of general well-being, but also one's commitment to life and the desire to continue living, it is a unique and valuable indicator of well-being. Empirical findings lend support to its special features. Practically, the tools for evaluating the WTL are parsimonious, easy to use, and well accepted by older people. All of these lead us to recommend using the WTL for diagnostic and prognostic purposes. INTRODUCTION The will to live (WTL) is perceived as the psychological expression of the basic, natural, and built-in instinct of every living creature – the striving for life. This existential concept has been addressed in philosophy, poetry, and prose, but until recently it has not attracted much attention in the behavioral sciences.