Definition Labor: All forms of human input, both physical and mental, into current production. Land and raw materials: Inputs into production that are provided by nature: e.g. unimproved land and mineral deposits in the ground. Capital All inputs into production that have themselves been produced. e.g. factories, machines and toolsDefinition Labor: All forms of human input, both physical and mental, into current production. Land and raw materials: Inputs into production that are provided by nature: e.g. unimproved land and mineral deposits in the ground. Capital :All inputs into production that have themselves been produced: e.g. factories, machines and tools