The factor of shifting from an agricultural economy to an industrial economy.
<u>Explanation:
</u>
After the advent of industrialization, most people preferred moving to industrial towns leaving agriculture behind.
As more people opted to work in industries, the demand for labor automatically subsided and the industry owners started exploiting their workers.
To protect their own interests, the workers found it necessary to form unions. The membership of such unions gained for workers protection against exploitation by the industrialists.
One major pull factor that contributed to the population growth shown in the urban area of northern Illinois and Indiana was "<span>racial discrimination," since many blacks in the South fled to the North in the hopes of living better lives. </span>
