It is an interesting topic. I vote 90%.
To me, the big event that’ll occur in the 21st century is when we learn enough about neuroscience that intelligence (the g factor) is no longer limited by biology. If a world class professor of science at MIT has a g factor that is 3x higher than a mildly retarded person who can barely perform grade school math, then what happens when we figure out how to engineer people or computers with a g factor 3x higher than an MIT professor? What kinds of ideas will that cause? One will be finding ways to create brains or computers with g factors 100x higher. And so on, it’ll grow exponentially from that.
Once we understand the neuroscience behind intelligence, creativity, pattern recognition, working memory, problem solving, etc. and how to make it better then everything changes.
I assume for the most part it’ll be a good change. But I really am not sure.
Other problems we are going to face like natural resource shortages will be problems, but I don’t think they’ll destroy civilization.
I don’t think any asteroids are predicted to hit in the next 100. One will come close in the next 30 or so years, but I think the odds of that one actually hitting us are low. Besides, people are working on space technology that’ll pull/push asteroids away before they get a chance to hit us. I have no idea when it’ll be ready, but asteroids may not be a huge problem after the next few decades.
The world survived the wars and genocides of the 20th century. Both world wars, the purges of Stalin, Hitler, Pol Pot, Armenia, Rwanda, etc. Something like 200+ million people died in the 20th century due to war and purges. But civilization survived. If anything, wars and genocide shouldn’t be as bad in the future because of the trend towards more liberal democracy, global government intervention and communication/recording devices that is occurring.
Also I don’t think mass starvation is a ‘huge’ risk. It is a risk for people in poor, developing countries (the number of malnourished increased by about 100 million since the global recession started). However agricultural yields keep going up per acre, new farmland in Africa and Eastern Europe is being farm and hydroponics is advancing. So I don’t think civilization will starve.
And global warming, even at its worst, shouldn’t ‘end’ civilization anymore than WW2 ended civilization. It’ll do trillions in damage and permanently change the course of the planet, but civilization will keep going.
Keep in mind that European civilization survived the black plague. It killed 30-50% of all citizens of Europe, and back then Europeans had no medical technology or medical know how whatsoever (unlike today, if we faced a mass pestilence at least we’d understand about vectors, sanitation, antimicrobials, hand washing, etc). So if European civilization can survive the black plague with no medicine or understanding of disease then we can survive whatever the 21st century offers.
I’m surprised humanity survived as long as it did w/o technology and science. Surviving with those things should be far easier.