What kind of ideas will die with them?
Seems like more likely the ideas wouldn’t be had in the first place.
Discussion
Look into the origins of the journeyman system in German. It is a very real problem when you have no protection for ideas or techniques that they are lost when the inventor dies
Somehow I did and missed what you mean. Can you share an example?
The journeyman system was created to share trade secrets in skilled trades like carpentry, masonry, architecture, ect. A master would train an apprentice with "secret" knowledge with the agreement that the apprentice would leave the town and not compete against the master becoming a journeyman: literally leaving (going on a journey) to then establish a business elsewhere. Without this system the masters would horde knowledge for a business advantage and die without sharing the advanced techniques
This sounds like an argument against the idea of intellectual property, right? These guys were just protecting their innovations. What am I missing? Believing IP is real property or not wouldn’t result in them sharing their trade secrets would they?
The journeyman system is basically a location based non-compete agreement. It protects the competitive business advantage of the master and gives him the confidence to share knowledge without his apprentice eroding his profits
How would a society enforcing idea-ownership solved this problem?
That's what the patent system does, it is meant to reward the creators with royalties or a temporary monopoly on production
Hmm, I believe patents aren’t used for trade secrets like the above example for exactly that reason. They are only used when there is a likelihood that people are going to figure it out the secret in the process of making money on it. If obfuscation is possible, it works better than patents.