Government concerns about great disparities in housing conditions, what are often called housing crises, date to at least the 1920s. These great disparities are, of course, still with us 100 years later. In this essay, we argue there will be no progress ending these great disparities until the residential construction industry adopts technology that other industries began adopting more than 100 years ago – factory production methods. There have been attempts to introduce these methods in residential construction for the last century, but they are always blocked and sabotaged by monopolies in the traditional construction sector, that is, the sector producing homes outside, on-site, using “stick-built” methods. Monopolies in traditional construction sabotage many types of factory-built homes. In this essay, we focus on the sabotage of particular types of such homes, what we call small-modular homes. These homes can be produced and sold at very-low prices, so that the sabotage of these homes has disproportionately hurt the low-income. The sabotage is the primary reason for the existence of, and perpetuation of, U.S. housing crises.