That period only seems peaceful because the French had just been massively humiliated in the Franco-Prussian War [1] in 1870 and the powder keg had just been reset. The people of France were itching to go to war with Prussia/Germany to reclaim Alsace and Lorraine. Which created a massive arms race till WW1. Also, while Japan isn't in Europe, the Russo-Japanese war did happen in 1904 in that period resulting in a major loss of trust in the Russian monarchy and the subsequent 1905 Russian Revolution. The Europeans were still sending troops to aid in the subjugation of Africa (Boer wars, Anglo-Zulu wars etc) even then.
However, I do agree with you that people then thought that world peace was achieved. The 1910 book "The Great Illusion" [2] ironically argued European war was unlikely to start due to the great economic costs of destroying trade between nations. It got the consequences right at least.
> ok, I mean no harm to humanity, but, um,
Sorry to gate keep but then you're not lawful evil. A lawful evil character is completely okay with harming people (through legal means of course) as long as it benefits them.
Still doesn't excuse them though.