Answer:
he did his most creative work guiding the colonist as they laid out a network of tightly organized towns
The league of nations might have forced the united states to become an international peacekeeper
Answer:
The "grave danger" that the author is talking about is the danger of atomic weaponry
Explanation:
"Preliminary Statement of the Association of Manhattan District Scientists" was a 100-page report written after the atomic bombings in Hiroshima and Nagasaki.
The "grave danger" that the scientist is talking about in the article is the dangers of atomic weaponry. The article talks about the consequences that wrong decisions of leaders may have on its nations.
The main cause of the second industrial revolution was, natural resources, abundant labor supply, strong government policy and new sources of power.
