The First World War happened after Darwin's Theory was published, therefore, Darwin's Theory caused World War One.
I see. Then Darwin's Theory also caused jets, cars, computers, TV, radio, CAT scans, ibuprofen, frozen dinners, vacuum cleaners, Starbucks, McDonalds, cellular phones, Caller ID (one of my favorites), Hamburger Helper, microwave ovens, etc. No wonder the Amish are upset.
On the other hand, the California gold rush happened exactly before the publication of "Origins". We can therefore conclude that evolution was the first cultural fallout from the founding of California.
If you're a beer-lover, Darwin's Theory caused near-beer. You know what near-beer is? Mark Twain once observed that the man who named it was a poor judge of distance.
If you're conservative and a Catholic, Darwin's Theory caused Kennedys.