Essere e tempo

In 'Essere e tempo', Heidegger conducts a phenomenological exploration of human existence in terms of time.

The book is divided into two published sections and was intended to have a third section that was never completed.

Heidegger argues that our understanding of being is temporally structured and introduces concepts such as 'being-in-the-world', 'Dasein', and the distinction between 'readiness-to-hand' and 'presence-at-hand'.

The work is foundational for Heidegger's ontology and has had a profound influence on various philosophical and theoretical fields beyond philosophy itself.