Comment by _carbyau_

You two are arguing over a timeframe.

Limit IP laws to 20 years.

Humans go from birth to being released into the public domain as an adult in roughly that time. Why are ideas somehow not in the Public Domain after a generation has grown up?

That way Jack Kirby gets to make his money. Jack's kids can live off his money. But Jack's ideas are free to use after doing their time.