How to make the world a deader place

A super plague sweeps across the planet prior to the understanding, development of modern hygiene and medicine.
 

Clibanarius

Banned
An Asteroid and a dust cloud, followed by plagues from the corpses and an earthquake from the impact with in turn causes massive storms and tsunamis.

And then volcanoes start going off.

Does that answer your question?
 
A Yellowstone eruption should do the trick.
The question is how much deader you want the world to be.
 
Staying away from "natural disasters", why not prolong the Atlantic slave trade while strengthening slavery itself across the world? OTL, as late as 1782, the abolitionist movement in Britain was practically non-existent...
 
In the 19th century, Europeans start to see the "inferior races" (everyone else in the world) as un-needed and start killing them off. Very difficult to do, as while there was no shortage of European racism back then (and few scruples about killing if they needed to) they won't be too likely to spend money on reducing possible income.
 
Fall of Islamic Empires to chaos during the Middle Ages? The Muslims were really the ones keeping the knowledge of Rome and the ancient world alive, and made huge leaps in science and civilization (not to mention they were the most open and tolerant peoples during said time).
 
An ambitious project to clear large swaths of the Amazon Rainforest in the name of "economic development and social progress" spirals terribly out of control when a couple of the intentionally set forest fires get out of control. When, over a year and a half later, the fires had burned themselves out, a staggering 850,000 sq. miles of the rainforest was reduced to smoldering ashes. :eek:
 
Have the Crusades conquer the middle east and force Christianity on the area that might make harsher consequences in the world!
 
I'm not sure the Crusaders can do that.

Particularly given the absolute hostility it would inspire - and the ERE (if its around) wouldn't exactly support them in doing so.
 
Earlier European colonization of Africa results in SIV evolving into HIV much quicker, before the basics of virology are even known.
 
Earlier European colonization of Africa results in SIV evolving into HIV much quicker, before the basics of virology are even known.

I think that follows the Christianization of middle east by the crusades and the crusaders conquer the heretic Abyssinia.
 

Riain

Banned
Bypass the British agricultural revolution of the 1700s so that food production can't meet rising populations. That way every time Britain gets to about 6.5 million people famines and plagues break out and the population crashes. This would be the case all over the world, and would not allow the industrial rovolution to occur. A possible side effect could be endemic wars like the 30 years war which ravaged Germany and central Europe, this would add to the famine and plague cycle of low food production.
 

NothingNow

Banned
Give pre-columbian societies a couple of massively deadly plagues, like a more active and easily transmitted version of Chagas disease.
Have that Infect Most of Europe by the end of the 16th century, and all of Eurasia by the 19th, and regularly cull some 30% of every generation. Meanwhile the population of the Americas gets cut by some 80%.
 
There are two easy ways to achieve this:
- the Mongols mamage to conquer all of Europe and Asia. The result would be that not a single town would have survived and millions of people dead (the inhabitants of those towns which did not surrender) or in slavery (in inhabitants of the towns which did surrrender).
- No Black Death. Without the Black Death there will be no progress in hygiene and medicine. With a larger population at the end of the Medieval Age many other things would also have not been developed because there was no need to.
 
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