Less Harmful: ISC, MIT/X, BSD, CC0, public domain.
Yes, giving users even a smidgen of freedom like the GPL does is harmful. Who could say the terrible things that would happen if we don't keep the peasants well whipped and in their place.
People like him have gone on to be so circumpolitical in their defense of letting developer do anything they want that their licences have ended up recreating the huge inefficient Soviet design bureaus of the 1960's. Places where you had 5,000 people doing the work of 50.
You needn't look further than the closed source juggernauts like google, apple and microsoft to see how inefficient and wasteful they are with the human capital at their disposal. Open source projects still manage to beat them much of the time with 1/1000th the personnel and virtually no funding.