This book offers an in-depth exploration of the development of modern philosophy, from the early stages of the Renaissance to the 17th century. It reveals the major schools of thought that laid the foundation for modern thought, as well as their origins, which the author refers to as the “era of preparation for modern philosophy.” Muhammad Galab examines the origins of various philosophical movements and their leaders. He also explores how their attempts to develop simple and solid theories played a crucial role in the intellectual transformation that characterized European thought. Beyond traditional classifications, the book presents a new perspective that highlights the interconnectedness of ideas and their development over time. It guides readers to understand the relationship between history and philosophy—what happened, and how we understand it. This book combines academic precision with a straightforward approach, making it suitable for scholars, researchers, and anyone who loves philosophical knowledge.