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Without leadership, you lose the game The well-known German soccer official and current advisor at Borussia Dortmund, Matthias Sammer, is one of the greats in German soccer. In an interview with Dr. Gerald Schönbucher, CEO of Kaufland e-commerce, Sammer explains the origin of one of his guiding principles: “”Without leadership, everything is nothing””. Matthias Sammer discusses the power of hierarchical leadership and talks about how he has practiced leadership in his previous positions.