Origins
The noun 'vitality' entered English in the late sixteenth century from Latin 'vītālitās' (vital force, life-power), an abstract noun derived from 'vītālis' (of life, vital), from 'vīta' (life), from the verb 'vīvere' (to live), tracing to Proto-Indo-European *gʷeyh₃- (to live). The word names the quality that makes living things alive — the force, energy, and vigor that distinguishes the living from the dead.
In its most literal sense, 'vitality' refers to the capacity to live and grow. The vitality of a plant is its ability to photosynthesize, grow, and reproduce. The vitality of a population is its capacity to sustain itself — a function of birth rates, death rates, health, and environmental conditions. Ecologists speak of the 'vitality' of ecosystems, meaning their resilience, productivity, and ability to recover from disturbance.
In common usage, 'vitality' most often describes the energy and liveliness of a person. Someone with great vitality is vigorous, active, and full of life — they seem to have more energy than others, to be more intensely alive. Vitality in this sense is not merely health (the absence of disease) but something more: a positive quality of animation, enthusiasm, and physical and mental vigor. It is the quality that makes certain people seem to light up a room, to infect others with their energy.
Development
The concept of vitality has a complex philosophical history. Vitalism — the doctrine that living organisms contain a non-physical 'vital force' that cannot be reduced to chemistry and physics — was a major intellectual position from the seventeenth through the nineteenth centuries. Georg Ernst Stahl proposed the 'anima' (soul or vital principle) as the agent that organized and maintained living bodies. Xavier Bichat defined life as 'the totality of functions that resist death.' Henri Bergson developed the most philosophically sophisticated version of vitalism in his 'Creative Evolution' (1907), proposing the 'élan vital' — a creative vital impulse that drives the evolution of life toward ever-greater complexity and consciousness.
Bergson's 'élan vital' was immensely influential beyond philosophy. It shaped the literary modernism of Marcel Proust (who was Bergson's cousin by marriage) and Virginia Woolf. It influenced the political theories of Georges Sorel, who applied the concept of vital impulse to revolutionary action. It contributed to the development of process philosophy by Alfred North Whitehead, who shared Bergson's conviction that reality was fundamentally dynamic rather than static.
Scientific biology, however, has largely rejected vitalism. The synthesis of organic compounds from inorganic materials (beginning with Friedrich Wöhler's synthesis of urea in 1828), the discovery of the structure of DNA (Watson and Crick, 1953), and the development of molecular biology have demonstrated that living processes can be explained by chemistry and physics without invoking any non-material vital force. Life, in the scientific view, is an extraordinarily complex set of chemical reactions — not a special substance or force.
Later History
Yet the word 'vitality' persists because the quality it names is real, even if its ultimate explanation is chemical. A person recovering from illness has less vitality than a person in full health. A city can have vitality — a quality of bustle, diversity, and creative energy that makes it feel alive. A culture can have vitality — the capacity to generate new ideas, new art, new forms of expression. In each case, 'vitality' names something observable and important, even though it cannot be measured with an instrument.
The verb 'revitalize' — to give new vitality to — has become one of the most common words in urban planning and organizational management. Cities 'revitalize' declining neighborhoods. Companies 'revitalize' stagnant brands. Governments 'revitalize' struggling economies. The prefix 're-' (again) combines with 'vitalize' (to give life to) to mean 'to make alive again' — the same conceptual structure as 'revive,' but applied to social and economic systems rather than to individual organisms.
The Latin 'vīta' (life) is one of the most culturally resonant words in the Indo-European family. 'La dolce vita' (the sweet life) — the title of Federico Fellini's 1960 film — has become an English expression for a life of pleasure and indulgence. 'C'est la vie' (that's life) is a French expression of resigned acceptance. 'Curriculum vitae' (course of life) documents a professional career. Each expression treats 'vita' not as an abstract concept but as a story — a course, a quality, a texture. 'Vitality' names the best version of that story: a life lived with energy, vigor, and fullness.