1. Women empowerment
2. Distribute contraceptives
3. Decreasing the importance of marriage
4. Plague
5. War
Yeah, basically this. We could distinct two ways/methodology, violent and non violent.
First of your 3 points are psychological types of warfare, definitely non violent.
Now, your point nr4 is somewhere between the two. Depends of the nature of plague, planned or natural.
If natural than we cant categorise this as an act of any specific nature. It just happens.
@point5:
IMO the "best way" our technology could offer is the usage of autonomous equipment. Drones.
Small and agile, palm sized, flying quadrocopter equipped with one or two bullets. Simple and cheap machine of global annihilation.
Nuclear weapons are so last year...drone better - as Ivan said. Clean, quick, radiation and destruction free.
Imagine what 100K of such "toys" could do to a city center.