Riddle: I killed one fourth of all mankind. Who am I?
To solve this riddle, you need religious knowledge. If you are knowledgeable about this, I am sure you found the answer immediately.
But don’t worry if you haven’t found it. Our job is to explain!
Cain and Abel, the religious figures mentioned in the Tanah, the Old Testament, the Quran, and the hadiths Cain is the older son of Adam and Eve, and Abel the younger son. Cain is believed to have killed his brother Abel and was the first murderer in history.
So just killing his brother is enough for humanity to kill a quarter!
Because there were only 4 people in the world at that time.
Answer: Cain (who killed Abel).