...or the least advanced, and like an island of monkeys, the wiser civilizations decided to study us from a safe distance.
That's what I would do.
This planet is bloody dangerous!
I know that if I were an advanced alien and I discovered a planet full of primitive, warlike, violent naked apes with a primitive, emerging technological society, I would not be in any hurry to share technology or much of anything with them.
I would study them from a distance, take what I wanted and if I felt magnanimous, maybe guide their civilization... Or just sit back at a safe distance and keep an eye on them.
...like: how did this civilization become advanced? Was it thru a "learning" process, or were they just miraculously transformed into a higher technical level?...and if they did, would they not have gone thru the monkey stage?
Maybe God made them do it?
This is one of those things that we will ponder, probably until the Sun burns out. We are trapped mainly to our Solar system until we can get enough energy on one vehicle to propel it thru the speed of light...many times over.
Until then..enjoy the island...there probably are not any "wiser civilizations" out there...(but I am often wrong....)