- William McKinley (allthetropes.org)
William McKinley is mainly known nowadays as the President whose assassination resulted in the much-better-known Theodore Roosevelt coming into office. He is also one of the more famous victims of violence perpetrated in the name of Anarchism; a few short but eventful decades later, the radicals to really be afraid of would be communists instead. Much like James Garfield before him, technology was right there that probably would have saved him, but several decisions surrounding the operation didn’t work out for keeping him alive (the new “x-ray machine” being exhibited at the very expo where he was shot was too untested for doctors to trust it, and apparently they didn’t think to do the surgery under the brand-new electric lighting, nor could they use candles because ether was still the best anesthetic available at the time). Similarly, his assassination receives little attention in public memory compared to that of Abraham Lincoln or John F. Kennedy, despite serving longer than the latter.
- Uniformitarianism (Wikipedia)
Uniformitarianism, also known as the Doctrine of Uniformity or the Uniformitarian Principle, is the assumption that the same natural laws and processes that operate in our present-day scientific observations have always operated in the universe in the past and apply everywhere in the universe. It refers to invariance in the metaphysical principles underpinning science, such as the constancy of cause and effect throughout space-time, but has also been used to describe spatiotemporal invariance of physical laws. Though an unprovable postulate that cannot be verified using the scientific method, some consider that uniformitarianism should be a required first principle in scientific research.