The idea that human action and inaction originates from a person's intended future and particular projects, rather than from external sources such as laws, is a central tenet of Sartre's existentialist philosophy. Sartre argues that individuals have complete freedom and responsibility for their actions, and that external factors such as laws and societal norms do not determine behavior. Instead, individuals create their own meaning and purpose through their projects and the choices they make.
However, this view has been criticized by some as ignoring the influence of objective, external factors in shaping human behavior. Some argue that laws and societal norms play a significant role in determining human actions and that individuals are not always completely free to act as they choose.
The notion of "existential absurdity" refers to the feeling of meaningless and purposelessness that arises from the realization of the freedom and responsibility of human existence. According to Sartre, individuals must embrace their freedom and create their own meaning, despite the inherent lack of objective purpose in existence.
Overall, the idea that human action originates from a person's intended future and projects, and the concept of existential absurdity, are key components of Sartre's existentialist philosophy. However, they continue to be debated and discussed within the philosophical community.