Johann Silvio Gesell was a German-Argentine economist, entrepreneur, and social reformer. He was the founder of Freiwirtschaft, an economic model for market socialism. In 1900, he founded the magazine Money and Land Reform, but it soon closed for financial reasons. During his time in Oranienburg, Gesell started the magazine Der Physiokrat together with George Heinrich Blumenthal. In 1914, it closed due to censorship. In 1916, he published his most famous work, The Natural Economic Order.