Good Question.
BUT, the answer is always the same & it doesn’t take a degree in nuclear physics:
To test us!!
AND the result also is always the same:
WE FAIL!!
The hoped for result: To drive us to GOD’S GRACE & forgiveness through Jesus Christ.
Most often: UNSUCCESSFUL!!
Thank you. The truth.
A thorough reading of The Book of Job would answer any and all questions regarding evil in the world and man’s response. Mankind is on this insane trip that by doing the same thing over and over, that different results will somehow occur.
On an intelligence scale, man’s perception may be triple digits; but in real actions, a slug is smarter.