黑格爾(1770～1831)，德國古典唯心主義辯證法哲學的集大成者，徹底的客觀唯心主義者。他主張，理念是第一性的，它以純概念的形式在邏輯學中不斷發展，然後理念外化成為自然界，最後又在精神哲學的各門科學中迴復到理念自身。這樣，他建立瞭一個以理念為基礎的、包括瞭一切科學的龐大的客觀唯心主義體係。他在哲學史上的主要貢獻是，把矛盾看作一切事物的真理與本質，論述瞭辯證法就是對立麵的統一。他把整個的自然界、人類社會、人的思維都看作處於普遍聯係與發展變化中。其辯證法的不徹底性在於，他的作為“絕對真理”的哲學體係是絕對的、永恒不變的。馬剋思和恩格斯在創立唯物辯證法時，批判地吸取瞭黑格爾哲學中的辯證法這一閤理內核。主要著作有《精神現象學》、《邏輯學》、《哲學史講演錄》、《哲學全書綱要》等。後者分為“邏輯哲學”、“自然哲學”、“精神哲學”三部分，是對其全部哲學體係的闡述。

Hegel's Encyclopaedia Logic constitutes the foundation of the system of philosophy presented in his Encyclopaedia of the Philosophical Sciences. Together with his Science of Logic, it contains the most explicit formulation of his enduringly influential dialectical method and of the categorical system underlying his thought. It offers a more compact presentation of his dialectical method than is found elsewhere, and also incorporates changes that he would have made to the second edition of the Science of Logic if he had lived to do so. This volume presents it in a new translation with a helpful introduction and notes. It will be a valuable reference work for scholars and students of Hegel and German idealism, as well as for those who are interested in the post-Hegelian character of contemporary philosophy.