Martin Heidegger's Being and Time [Sein und Zeit, 1927] is one of the greatest and most influential achievements of twentieth-century philosophy. Yet this work represents only a fragment of the author's project, as first outlined. It does credit to his own reticence in not rushing into print and to the acumen and prudence of senior backers of his appointment to a professorship at the University of Marburg in 1926 that they urged him to publish, having learned that the success of their nomination depended on publication of the candidate's recent thinking.
Heidegger had planned his work in two parts. The first part was to contain an analytic of Dasein (Heidegger's word for human being) with …
Dye, Ellis. "Sein und Zeit". The Literary Encyclopedia. First published 11 March 2010
[https://www.litencyc.com/php/sworks.php?rec=true&UID=6389, accessed 23 January 2018.]