Complex sentence: Proposed in the 1980s by Günter Wächtershäuser, encouraged and supported by Karl R. Popper, in his iron--sulfur world theory, this hypothesis postulates the evolution of (bio) chemical pathways as fundamentals of the evolution of life.
Split into simpler sentences: Proposed in the 1980s by Günter Wächtershäuser, encouraged and supported by Karl R. Popper, in his iron--sulfur world theory. In this theory, he postulated the evolution of (bio) chemical pathways as fundamentals of the evolution of life.