The book includes a continuation of Part III “Religious and Ideological Systems”, consisting of sections 3. 3. 3 The Religious System of Historical Islam and the Culture of the Quran" and 3. 3. 4 "Masonry and Marxism" . Completes the fourth book of a separate section "Theology of Russian civilization" . The chapter on the religious system of historical Islam ends with a cycle of consideration of the three main “world” religious systems (Judaism, biblical Christianity and historical Islam), considered “Abrahamic”, and their interrelations. Next chapter “Masonry and Marxism” continues the theme of the biblical concept from the point of view of the expediency of the global scenario. And finally, the last chapter of the fourth book is a look at some of the main aspects of Russian theology.