Someone asked me a very good question: Why did this decline happen? I used this question to write some of my thoughts down on http://en.wiki.oekonux.org/StefanMerten/AboutSocialSystems I put it under my personal page because I guess it is only my opinion and thus not very useful in a less private place. However, feel free to comment if you like. Mit Freien Grüßen Stefan

http://en.wiki.oekonux.org/StefanMerten/AboutSocialSystems