An Enquiry Concerning Human Understanding
by David Hume (1748)

This text is essential for the proper understanding of people and philosophy.

Different Species Of Philosophy
Origin Of Ideas
Association Of Ideas
Sceptical Doubts Concerning The Operations Of The Understanding
Sceptical Solution Of These Doubts
Idea Of Necessary Connexion
Liberty And Necessity
Reason Of Animals
A Particular Providence And Of A Future State
(Case Against Theism)
Academical Or Sceptical Philosophy