Within the first century A.D., a new faith arose partly within Judaism and in part around its outer edge. This faith adopted and used Hebrew Bible (Jews), called "The Old Testament." According to Christian history, the Jewish establishment at that time had rejected Jesus and persuaded the Roman authorities to get rid of him. Resulting in Roman authorities placing Jesus on the Cross. The term Judeo-Christian subculture supposes a common essence shared between Jews and Christians. From that era to the world today, everything has changed. The world outlook has been changing since the beginning of time, and it will continue to do so. Along with the world outlook, the Role of religions is also evolving with the world's outlook. On several occasions in history, Christianity and Islam were considered to go extinct, but in the modern world, they are the two largest religions. This book will discuss and shed light on the world outlook and its effects on other entities. Christianity has always been the centre of attention regarding the world outlook. Christianity holds the largest army and most of the world's wealth as the world's biggest religion. Therefore, Christianity has excellent power in changing the world's outlook and demographics. But, Islam or Atheism may surpass Christianity in the coming years. Most probably in 2050. We will discuss all such possibilities in detail later in the book.