Who said “It must be realized in Packingtown that workers are human beings”?

Upton Beall Sinclair Jr.

Explanation:

Upton Beall Sinclair Jr. was widely known for his writing proficiency specifically in the areas of social tracts and politics protest and was prominent as a result of one his book titled: The Jungle, which was published in the year 1906. In the book, Upton Sinclair declared amongst other things that " It must be realized in Packingtown that workers are human beings”

Hence, it was Upton Beall Sinclair Jr. that said "It must be realized in Packingtown that workers are human beings”

he supported the seperation of church and state. he also promoted religious tolerance.