If you want to know the truth. Start at the beginning. Look at what the holy books have to say about the origin of Mankind.

Quran 2:30:
واذ قال ربك للملئكة انى جاعل فى الارض خليفة قالوا اتجعل فيها من يفسد فيها
ويسفك الدماء ونحن نسبح بحمدك ونقدس لك قال انى اعلم ما لا تعلمون

Your Lord said to the angels, "I am placing a representative on earth." They said, "Would You place in it he who would corrupt it, and shed blood, while we sing Your glory, and praise You?" He said, "I know what you do not know."

They were describing what they were seeing!

Bible- Romans 5:12 :

"Wherefore, as by one man sin entered into the world, and death by sin; and so death passed upon all men, for that all have sinned"