From that which has been established in the Sharee'ah (prescribed law) is that mankind was - in the beginning - a single nation upn true Tawheed, then Shirk (directing any part o form of worship, o anything else that is solely the right of Allah,

to other than Allah) gradually overcame them. The basis for this is the saying of Allah - the Most Blessed, the Most high:

"Mankind was one Ummah, then Allah sent prophets bringing good news and warnings." (Surah Baqarah 2:213)

Ibn 'Abbas - radiallaahu 'anhu - said:

"Between Nooh (AS) (Noah) and Adam (AS) were ten generations, all of them were upon...