This is not true! There are many other such factors.
One of them is similar to food: the availability of water.
Other is also natural disasters: tsunamis, earthquakes... they also limit population from time to time. Similarly diseases such as Aids.
The Great Depression wreaked havoc with gender roles because men who lost their jobs often suffered a decline in status within the family.
Answer:
Poison gas, machine guns, artillery bombardment, submarines air planes etc. were weapons of war that caused enormous damage. Some of them - e.g. artillery existed - long time but modern technologies made it much more destructive. Paradoxically the level of technology was also lacking in some ways.
Explanation: Can you make me Brainlest if i get right?
