Complex sentence: The systems can grow organically as the collective result of numerous individual agreements between international economic actors spread over several decades-or they can arise from a single architectural vision as happened at Bretton Woods in 1944.
Split into simpler sentences: The systems can grow organically as the collective result of numerous individual agreements between international economic actors spread over several decades. Alternatively, they can arise from a single architectural vision as happened at Bretton Woods in 1944.