From a 1989 interview:

I wrote a song called “I Belong to a World That’s Destroying Itself” in 1969. That was 20 years ago. It’s getting worse, not better. People are victims of habit. It’s very difficult to break behaviour patterns. Not many people are able or willing to take the effort to do that. Unless it becomes a socially accepted lifestyle to change your behaviour patterns very quickly, I can’t feel too positive.