In the 1960s, uneducated blacks could find jobs more easily than educated ones could, confounding efforts to improve the lives of people who lived in the neighborhood through education. Land owners took advantage of the neighborhood and offered apartments to the lower-class families for cheaper rent but in lower-class conditions. By 1999 there were 179,000 housing units available in Harlem. Housing activists in Harlem state that, even after residents were given vouchers for the Section 8 housing that was being placed, many were not able to live there and had to find homes elsewhere or become homeless. These policies are examples of societal racism, also known as structural racism. As public health leaders have named structural racism as a key social determinant of health disparities between racial and ethnic minorities, these 20th century policies have contributed to the current population health disparities between Central Harlem and other New York City neighborhoods.