Some of my favorite entrepreneurial companies have very strong social missions: Stoneyfield Farm,  Honest Tea, TerraCycle, Timberland, and Patagonia, to name just a few. Note that these are all extremely successful companies whose CEOS routinely talk about how having a social mission   — whether it’s promoting community-based agriculture, supporting environmental causes, or creating a culture of volunteerism - has helped drive revenue growth, increase employee retention, and provide the company with a brand differentiation strategy.