what is human biggest fear?
468153
Lonliness.\n\nLove is a greater drive than hunger.\n\nAll you need is love.
63710
Fear.  Fear of being wrong causes people to block out their reasoning abilities.  Its easier to deny, say "no", or just go with whatever the pack already decided.
684691
Facing your fears is the best way. Fear of what anyway?
862397
omniphobia - the fear of everything\n\nHope it helps. =]
1103390
The biggest threat to humanity is inhumanity. But picking from your list I'd say viruses top the list of recurring real threats. For the more theoretical ones I'd say most catastrophic: 1) invasion by unfriendly aliens 2) meteors 3) advanced AI. Most likely: 1) advanced AI 2) meteors 3) alien invasion. Not too concerned about warfare, we've had a long history of dealing with that. Also not too concerned about climate change, we can come up with technology to deal with that.
650184
Being afraid is an evolutionary trait to keep you away from things that are generally dangerous or that increase your exposure to danger
398338
Fear of peanut butter sticking to the roof of the mouth.\n\n(one of the odder ones that I have heard of)
45517
Most people are afraid of things they do not understand
1013264
MY GREATEST FEAR IS BEING ALONE
163960
http://www.phobia-fear-release.com/bogyphobia.html\n\nMaybe that will help with something
423000
Fear of earthquakes, flooding, water pollution - just some ideas to get you started.
59465
I have two.\n\nThe only thing we have to fear is fear itself\n\nask not what your country can do for you but what you can for your country
442314
Human beings.  Most destructive force on earth - they drain wetlands, flood dry lands, stomp out vegetation with their cattle, cut down whole forests, dump their toxic garbage into streams and rivers and the ground, deplete the sea of fishes  and mammals, fill the air with noxious fumes, etc...they poison the world.
426831
GO SWIN IN THE OCEAN! best way to remove ur fear is to face it!
1042134
its human nature to have obsessive fears i have a fear of clowns and small spaces(claustrophobia) dont stress so much about it because it will only make it worse
513676
It would be interesting if you talked about the psychology of fear and what goes on in your brain chemcially. As far as individual fear, hear are some good links.\nGENERAL INFORMATION\nhttp://phobialist.com/\nhttp://www.socialphobia.org/\nhttp://www.mentalhealth.com/dis/p20-an04.html\nhttp://en.wikipedia.org/wiki/Phobia\nhttp://www.phobiaguide.com/\nMOST COMMON PHOBIAS\nhttp://www.phobia-fear-release.com/ten-most-common-phobias.html\nhttp://www.athealth.com/consumer/disorders/Phobias.html
985400
The brain.  The biggest challenge for humans is the mental causes for physical illness and disease.\n\nPeace!