In Marx's day, he was referring to people living off of subsistence agriculture who were looking for monetary employment in industry. In modern times, people coming from slums in developing countries where they survive largely by non-monetary means, to developed cities where they work for pay might form the latent.[clarification needed] Housewives who move from unpaid to paid employment for a business could also form a part of the latent reserve. They are not unemployed because they are not necessarily actively looking for a job, but if capital needs extra workers, it can pull them out of the latent reserve.