Wish I could be a social entrepreneur

In my LGST210 class today we went over different corporate social initiatives and gave them grades based on how effective we thought they were or what their cause was. One of the companies that really caught my attention was Tom's Shoes. They sell very simple shoes at an affordable price, but their real value proposition is that for every pair sold, they will donate a pair to a child in need. I thought this was very unique and interesting because the company is still for-profit. Yet I truly believe that the founder's intention from the beginning was to simply create a sustainable business that had a great cause. It was a bold $1M+ investment for the founder to make but I have to say it did work out and now the world is a better place for it. Though shoes may not necessarily be the cause everyone believes it the highest priority on the list - it's a great start. It really gets me thinking even more about what kind of things can I build that not only will be beneficial to myself but the world. What can I create that will be successful enough to sustain its good cause for a significant and meaningful amount of time in this world. I'll keep thinking. Meanwhile, let me know if you have any suggestions.