The answer is the first Amendment
The First Amendment (Amendment I) to the United States Constitution prevents the government from making laws which respect an establishment of religion, prohibit the free exercise of religion, or abridge the freedom of speech, the freedom of the press, the right to peaceably assemble, or the right to petition the government for redress of grievances.
There were several actions of the government around the turn of the century that social Darwinists would disapproved of, but one of the major ones was aid to the poor.
The civil war is most probably one of the best researched conflicts in world history. However, there is still a lot of space for discussion and speculation.
Answer:
Prolly Britain
Explanation:
Britain is infamous for being reduced from controlling the world to a tiny island within a century, Japan was still feudal (i believe), America was... being America ig, and Germany wasn't that powerful compared to other European countries.