World's biggest problems

The worlds biggest problems are (in no particular order):

1. World hunger-Many people around the world die each day due to lack of nutrients.  There is no easy way to fix this problem due to the vast scale of it, but with more technological advances in GMO's there might be a way to feed people.  Or for just 30 cents a day you can help feed a child in need.
2. Uneducated populace-Many people around the world are in very bad situations and do not get the privilege to learn about how the world looks.  Other people in the world have the chance to learn but don't take advantage of it, especially in america.  America is the wealthiest nation in the world, but it is not the "smartest".  Our education system is flawed and out of date.  The best way to fix this problem will be to update our education system.
3. Over population-There is only so many people that can live on the earth at one time due to the amount of resources earth has.  There are around 7 billion people alive on the earth right now.  Advancement in technology as well as a reduction in the rate at which people are being produced will help this problem.
4. Lack of drinking water-Similar to the over population problem, the earth only has a set amount of resources.  Advancement in technology or a way to convert ocean water into drinking water will solve this problem.
5. War/advancement in war technology-War has and will always be a huge problem the world faces.  Before nuclear weapons war wasn't as deadly as it is now.  If the current status stays how it is then war should not be a problem.
6. Diseases -Diseases have always been a very serious thing.  In my life time there has been 2 wide spread dangerous diseases.  There was the bird flu that was very dangerous as well as ebola.  Advances in technology should hopefully keep dangerous diseases from spreading.
7. Climate change-The weather is reportedly getting warmer because of burning fossil fuels.  Once we can find an efficient way to produce energy this wont be a problem anymore. 
8. Homeless population-Many people world wide, as well as in america, are homeless due to many reasons.  Many people just live in a country where they will be lucky to find water to drink everyday let alone find a place to sleep.  Homeless shelters are a band aid for this problem.  I can't think of an effective way to fix this problem that wouldn't have people abusing this to get free housing.
9. Terrorism-Terrorism is a very bad thing, but will happen when people have differing views and one group of people are more drastic.  Terrorism is always potentially a problem and there is no way to really stop it.  All we can do is upgrade security and always be ready for a terrorism attack.
10. Middle class being destroyed-The middle class in America is slowly being destroyed.  The gap between the rich and the poor is growing larger and the middle class is being pushed down.  I am not sure about how to fix this problem either.  I would guess decreasing the money supply and decreasing the national interest rate would help make the American dollar worth more money and that would help the US with oversea exports and imports, but in turn it would also make the US deficit larger.

In conclusion, I think the most important thing for the world right now is for us to focus on advancing technology and education.  There are an infinite amount of things we don't even know are possible yet that will one day help the world.