Destiny, sometimes also called fate (from Latin fatum 'decree, prediction, destiny, fate'), is a predetermined course of events. It may be conceived as a predetermined future, whether in general or of an individual.

Although often used interchangeably, the words fate and destiny have distinct connotations. The earliest known mention of the term or its meaning is found on a document written in cuneiform script that reports on the mythical Tablet of Destinies. It probably refers to a political treaty between three groups of Sumerian gods (cf. the Epic Athra Hasis), whereby only the leader has the power to restore the things he once determined to their original state.

Todays traditional usage defines fate similar: as a power or agency that predetermines (rules) the attributes of a thing or set of events positively or negatively affecting someone or a group. Other possibilities are that of an idiom, to tell someone's fortune, or simply the result of chance and events. In Hellenistic civilization, the chaotic and unforeseeable turns of chance gave increasing prominence to a previously less notable goddess, Tyche (literally "Luck"), who embodied the good fortune of a city and all whose lives depended on its security and prosperity, two good qualities of life that appeared to be out of human reach. The Roman image of Fortuna, with the wheel she blindly turned, was retained by Christian writers including Boethius, revived strongly in the Renaissance, and survives in some forms today.

Philosophy on the concepts of destiny and fate has existed since the Hellenistic period with groups such as the Stoics and the Epicureans.

The Stoics believed that human decisions and actions ultimately went according to a divine plan devised by a god.^{[citation needed]} They claimed that although humans theoretically have free will, their souls and the circumstances under which they live are all part of the universal network of fate.

The Epicureans challenged the Stoic beliefs by denying the existence of this divine fate. They believed that a human's actions were voluntary so long as they were rational.

In common usage, destiny and fate are synonymous, but with regard to 19th-century philosophy, the words gained inherently different meanings.

For Arthur Schopenhauer, destiny was just a manifestation of the Will to Live, which can be at the same time living fate and choice of overrunning fate, by means of the Art, of the Morality and of the Ascesis.^{[citation needed]}