A fallacy of composition is a logical error that arises when a fact that holds for a component or part is extended and asserted to hold for an entire system or unit. For instance, while atoms are invisible to the human eye and the Earth is composed of atoms, the conclusion that the Earth is invisible is clearly invalid. Fallacies of composition appear in several prominent economic arguments. In the paradox of thrift, when a thrifty individual saves more, his or her net worth rises. However, higher saving across the economy will not increase societal net worth since saving more requires spending less, destroying income for another member of society. In fact, an increase in collective savings can actually lower wealth for everyone if it diminishes the size of the economic pie. For a more thorough explanation, see Paradox of Thrift: Keynesian Response to Say’s Law.