Question

What impact did Sinclair‘s book have on the era of progressive reform

Answer 1

Sinclair's book, which detailed the state inside meat processing factories in the US, led to massive public outcry, with people putting pressure on the government to regulate and restrict those awful practices.

Answer 2

It was part of the muckraking trend in journalism and helped to keep that going. It also showed people how progressive activism could bring about change. Since, "The Jungle" did bring about reform by the Federal government.