The fact is that most patents for things that are "invented" but entirely virtually don't really deserve patent protection. Rarely is there significant research, expense or tooling to implement. Patents on software, processes and most extension patents are ridiculous in premise. That's what trade secrets are for.
No, we have not.
...Or at least, not yet.
Patents (and land mines) are a lot less useful to society.
Global trade back then was like our modern dot-com boom, but with real money and merchandise. People were sure it would change everything. Turned out not so much. As long as the lives of the old men who ran the world weren't personally at risk, they had no reason not to go to war with each other. Nukes, not trade, were what finally changed that calculation.
It is, in fact, the poster child for survivorship bias!
We have also come extremely close to having nuclear war, on multiple occasions.
We have less armed conflicts and their victims now than during the MAD years of the cold war---perhaps that's a better piece of evidence that something other than nuclear weapons is helping us keep the peace?
It seems disingenuous to assume that the way it happened is the only way it could have happened. MAD exchanged the near-certainty of world war for a coin-flip between mostly-peace and total annihilation. We can certainly be happy that we lucked out on the coin-flip, but I don't think it follows that MAD was a policy of pure wisdom and sanity.
The real concern is the ascendance of leaders who don't care if they die, or whose religion assures them that they'll come out on the winning side of Armageddon. But the analogies with patent law run out of steam well before reaching that point.
But I agree that it probably sounds cheaper to settle. The same is true with terrorists when it involves hostages, or kidnapping, though. These patent trolls are just corporate terrorists.
These lawyers are doing great work by creating a market that allows innovators to profit from their work even if they don't have the capital to commercialize their innovations themselves.
The incumbents can cry about this but even if they have never sued anyone for infringement their valuations are still based on their portfolios and they still use the threat to suppress competition and when they are over a barrel for cash they will monetize those patents either themselves or by selling to another "troll."
Individual software engineers who invent new technologies deserve to get compensated the same as anyone else for their inventions.