The iron-sulfur world theory is a theory of the origin of life, developed by Günter Wächtershäuser, a Munich chemist and patent lawyer, that processes the forms of iron and sulfur. Wächtershäuser argues for the thesis that an early form of metabolism occurs before genes.
Here, metabolism refers to a chain of chemical reactions that will produce energy to be operated by other processes. According to this idea, once the primitive metabolic chain was created, it began to form more complex systems. One of the key ideas of the theory is that this early chemistry of life did not occur in dense solution in the oceans, but on mineral surfaces located next to deep hydrothermal ponds (example: iron pyrites).