I guess if you wanted an analyzed, constructive and yet thought-provoking answer one would centralize on the following: - Greed: This often comes in the form of government manipulation and miss use of funding that although is meant for charity/good purpose often ends up swallowed whole by leading government officials for their own selfish expenditure.
It also involves the theft and exploitation of natural resources - a good case study would be South Africa, involving British/American investors to invest in operations with the sole objective of exploiting diamonds, gold, ore, etc to be sold excessively to the Western world with very little revenue back tracked to the South African economy.
Poor leadership - again referring to the type of government leadership in third world nations. Spending money and resources on short-term fixes and failing to acknowledge the need for long-term solutions and widespread investment. Often third world leaders are under educated, corrupt and narrow-minded - a good case study would be Robert Mugabe and other African leaders.
Lack of resources - this refers to the people. They have very poor access to resources that we here in the Western world often take for granted. Things like clean, running water supply, safe and strong housing, accessible education, heath care and government welfare, etc.
People in the third world do not have this and don't even dream of having such resources because they don't know that they even exist. Girls as young as 9 are married off for two or three cattle.
There are a number of issues and concerns surrounding the concept of global hunger and "the world is fucked up" has to be one of the most ill-informed I have ever heard.
Regards