 With the rise of eugenics in the latter part of the nineteenth century, such deviations were viewed as dangerous to the health of entire populations.With disability viewed as part of a person's biological make-up and thus their genetic inheritance, scientists turned their attention to notions of weeding such as "deviations" out of the gene pool.Various metrics for assessing a person's genetic fitness, which was then used to deport, sterilize, or institutionalize those deemed unfit.