In detail, no vague generalities, describe you proposal/solution. You'll need to provide the specifics of what should be done and how it all will work. Describe the change called for. Convince us why your solution is the best alternative for all concerned. Paint a picture of what the world will be like if we adopt your policy and give it a chance to work.
Agency of Change
Identify who can make the change happen. Explain why it should be them. If it's the "government," then what branch: executive, legislative, or judiciary? What level: city, county, state, national? Are there particular governmental agencies that address the problem you've chosen? Do we need to pass laws, bring lawsuits, write letters to our representatives? If "society" is to blame, then who? Private citizens everywhere? How are you going to make them all care? Are there international bodies that address this problem, like Amnesty International or the United Nations? Can private volunteer organizations help? Make it clear who will be on the forefront of this change.