Men and Nations: From Caves to Skyscraper

Earth is millions of years old and when human life came on earth surface opinions about this radically differ. Several legends about origin of the world and life have been given in religious books but so far scientifically none has proved true. Even Geologists, Geographers, Scientists and Historians have so far not been in a position to say that confidence about the origin of life on earth. Thus, so far our knowledge about history of nations and mankind is imperfect. It is rather based on guess work. Not much authentic and reliable evidence is available about origin of world. It is however, believed that life gradually came on earth and that human civilization too gradually evolved.