There are many examples of entrepreneurs who are making a positive impact on society. Some examples include:

1. Tom Szaky, founder of TerraCycle, a company that specializes in recycling hard-to-recycle waste. His company has helped to reduce the amount of waste in landfills and promote sustainable practices.

2. Blake Mycoskie, founder of TOMS shoes, has developed a unique business model where for every pair of shoes sold, a pair is donated to a child in need. This "one for one" model has helped to improve access to footwear for children in need around the world.

3. Muhammad Yunus, founder of Grameen Bank, pioneered the concept of microfinance to help lift people out of poverty. His work has helped to provide access to credit and financial services to millions of people in developing countries.

4. John Mackey, founder of Whole Foods Market, has been a leader in promoting sustainable and ethical business practices. Whole Foods Market is known for its commitment to organic and locally sourced products, and its efforts to reduce its environmental impact.

5. Ben Cohen and Jerry Greenfield, founders of Ben & Jerry's ice cream, have long been vocal advocates for social and environmental causes. They started a foundation that supports grassroots organizations working towards progress in these areas, and their company is known for its commitment to using sustainable ingredients and fair trade practices.

6. Patagonia, a clothing company, is one of the most well-known examples of a company that prioritizes environmental and social responsibility. They have committed to using sustainable materials, fair labor practices, and giving 1% of their sales to environmental causes.

These are just a few examples of entrepreneurs who are making a positive impact on society through their businesses. There are many more entrepreneurs who are using their skills, resources, and influence to create a better world for all.