Same logic: “Biologists invented animal mating.” “Capital” is a good or resource not immediately consumed. If I’m living on an island by myself and I catch ten fish a day, eat eight, and smoke the last two for keeping in a basket to eat later, those last two fish become “capital.” By saving the last two fish each day I open up the possibility of building time saving devices, or, capital investment. The concept of “capitalism” is built around delayed consumption and the allocation of resources and goods for economic expansion.