The 12 basic assumptions are so significant from my point of view that I wanted to describe them here all at once and in brief. Many of the considerations presented here can also be found in my other publications (Stegbauer 2016, 2018, 2024, but also much earlier, for example, 2001). The idea of the book was to compactly present the most important basic assumptions of network research. These come from my experiences in this field of science and they reflect the way in which people try to think sociologically there. So it is an invitation to also deal with network research. The idea of this book was to capture the basic thoughts of this research field in relatively short basic assumptions. I hope it has succeeded in presenting these in a readable way.