Existentialist philosophy, a school of thought that emerged in the 19th-20th century period, stresses individual liberty, free will, and personal experience. Fundamental to this school of thought is the idea that existence precedes essence, meaning that individuals determine their own significance and purpose through their deeds. Philosophers of existentialism like Jean-Paul Sartre and Friedrich Nietzsche contend that life is inherently meaningless, and it is up to each one to create their own values in a apparently indifferent world.

This ideology confronts traditional notions of predetermination and the concept that life's significance is pre-established. Instead, existentialism posits that people must face the fundamental irrationality of life and welcome their autonomy to decide and do. This often causes an existential crisis, where individuals grapple with feelings of anxiety and confusion as they confront the emptiness of intrinsic meaning. Nonetheless, it is through this dilemma that one can reach true existence by embracing liability for one's actions investment philosophy and forging personal meaning.

Existentialist philosophy also explores concepts of isolation, hopelessness, and the human experience. In a society where conventional beliefs and beliefs are often questioned, existentialism provides a foundation for comprehending the nuances of being human. By accepting the lack of universal truths, existentialist philosophy urges individuals to live intensely and truly, despite the doubts and difficulties of life. It is a call to embrace the autonomy and duty that come with being a person, and to seek meaning in an otherwise unfeeling existence.