Become a Movement Starter.

Our world needs movement starters more than ever. Purposeful is an invaluable resource for all would-be leaders who are ready to step up and make a difference, whether you are an activist or an entrepreneur. Packed with practical advice and the inspiring true stories of movement starters from all walks of life, Purposeful will empower you to start your own movement, and make your mark on the world.

Jennifer Dulski is the head of Groups and Community at Facebook. She also has more than 15 years' experience in successful startups and big-brand internet companies, including Yahoo! and The Dealmap, which was acquired by Google in 2011. She was most recently president and COO of Change.org.

Dulski writes about leadership, management and entrepreneurship for LinkedInInfluencers, Fortune, Huffington Post and other media outlets.