Human cannibalism is the act of eating other humans.
The concept is really horrifying to me. Was this a common practice a long time ago?
The Island Carib people had a long-standing reputation as cannibals
Fascinating. I know some have had to do it as a last resort. Is that true?
It is! A person who consumes humans is known as a cannibal.
Has human cannibalism best practiced in many parts of the world?
Cannibalism was prominent worldwide.
Are there times were human cannibalism was accepted or prominent? 
It is debated by scholars rather this was ever accepted behavior.