Marx and Engels typically use the term to refer to the socioeconomic relationships characteristic of a specific epoch; for example: a capitalist's exclusive relationship to a capital good, and a wage worker's consequent relation to the capitalist; a feudal lord's relationship to a fief, and the serf's consequent relation to the lord; a slavemaster's relationship to their slave; etc. It is contrasted with and also affected by what Marx called the forces of production.