What kind of science did david ricardos theory called the iron?

David Ricardo's theory called the "iron law of wages" is a concept in classical economics that suggests that wages naturally tend to gravitate towards the level necessary to maintain a worker at subsistence. It implies that any attempts to raise wages above this level would be counterproductive as it would lead to an increase in population, resulting in more workers competing for the same job and ultimately driving wages back down to subsistence.