During my research I found that the biggest setback to solving hunger, be it worldwide or locally, is distribution. The world as a whole produces enough food to feed twice our current population (over 15 billion people). Over 30% of food for sale in America goes uneaten, and about 15% of Americans are food insecure. If this food were to be distributed to those who need it, less waste would go in the landfill and nearly everybody in America would be fed.
A Worldwide Issue:
All over the industrialized world (but especially America), much food goes to waste. Large portions often get thrown out if uneaten. Grocers will often throw out cheese, bread, or fruits because they're slightly moldy/burnt/bruised. Dairy products and other goods are thrown out on their expiration date, despite the fact that many foods are completely safe for days, if not weeks to eat after that date.
Poverty & Hunger:
Jokes aside, hunger and poverty go hand & hand. A lack of food is one of the elements of poverty, and if someone can't afford clothing or health care then they're most likely having difficulty getting food as well. Accessible resources for the homeless are key, as many lack easy transportation to or from organizations that can help them.