But a supervolcano is an inhuman threat. So is war, regular, nuclear or civil. So is climate change, if we're too late to stop its progress.
On the other hand, in the 19th century diseases _would_ get about 1/4 to 1/2 (depending on what country you were in) of your kids before they turned 5. Check out http://www.gapminder.org/tools/#_state_time_value=1800;&mark... for example. And diseases were, at the time, very much an inhuman threat that you couldn't protect against; people didn't even have a very clear understanding of why they happened, much less what to do about it until the _end_ of the 19th century.
Dying in a mine or being murdered by noblemen isn't even a blip compared to dying of good old cholera, measles, typhus, etc, etc.
Natural disasters were always here. Wars and regional conflicts were just as plentiful and more deadly.