It's not to force open source, but to ensure that free software stays free. Freedom is good, right? The GPL is based on the belief that everlasting nearly-tota

It's not to force open source, but to ensure that free software stays free. Freedom is good, right? The GPL is based on the belief that everlasting nearly-total freedom is better than transient total freedom. Restrict exactly one freedom now, the ability to release without source, and you guarantee all the remaining freedoms (all of them!) to all future end users. Allow that one last freedom to developers, and you potentially deprive freedom from later users. The GPL doesn't stop people from using software in ways I don't approve. It only prevents further restrictions on freedom.