This book contains 2 short titles that all relate to philosophical and theoretical ideas. They are the following books:

Title 1: Today, we will take a look at the skeptical movement and ponder its significance, development, and application. This movement is worldwide and has been acknowledged by prominent scholars and theorists.

Title 2: In this guide, we’ll go over some of the main aspects of existentialism, depression, intelligence, and deep thinking. First, the six standard themes of existentialism will be explained. This will give you more insights in what it is, and how it is sub-divided into various issues that have been thought of by the great existentialist thinkers.