What was john spargo asking americans to do after they read his book?

He wanted the Americans to actively cooperate in find the remedies for the evils.

Ifound this on google “the existence of agglomeration economies is central to the explanation of how cities increase in size and population, which places the phenomenon on a larger scale. the concentration of economic activity in cities is one reason for their development and growth.” i hope this you for what your looking for.

River valleys were good places for hunting and fishing.