The open door policy was principles that was installed in 1899 and then the 1900s to Have a protection of equal or even trading among countries
Scientists like Einstein, Bethe, Fermi, Teller, and Bloch emigrated from "Germany" in order to escape persecution and pursue scientific research, since this took place during the rise of the Nazi Party, which was highly anti-Semitic.
Answer:
Their need for cotton would make their allies with the south
