Companies can help address social and environmental problems through corporate social responsibility initiatives and social business models. Under social business models, companies invest in sustainability projects that address issues like poverty, illiteracy, or disease, with the goal of making the projects self-sustaining so the company can recoup its initial investment over time. Rather than pure charity, this approach creates long-term solutions by building institutions' capacity for self-sufficiency, benefiting both society and the investing companies' own security and interests.