By chance, I found An Introduction to Radical Constructivism online. This article is part of the excellent book “Die erfundene Wirklichkeit” (edited by Paul Watzlawick) that influenced me a lot during my university studies.

Call constructivism my theoretical mantra 😉 It’s the only theory that does not attempt to explain reality and defines truths, but explains why we explain reality the way we explain it – and why we fight for a certain truth. It also serves as a perfect theoretical basis to understand “knowledge” as a social phenomena.