Of course corruption. Most negative things happening to a country are caused by selfish corrupt leaders who think only about themselves and their pockets. Poverty, hunger, lack of education ,all these cam be properly addressed only if the people in power would do their job properly
The biggest problem in our country is unemployment resulting to crime and poverty. Because of unemployment, many people are engaged in illegal acts such as drug running/pushing, gambling and killings in the name of money.
And because of unemployment, many people especially in remote areas suffer from poverty.