The Starfish and the Spider organizations: Niklas Zennstrom and Skype; Craig Newmark and Craigslist. They discuss the formation of the Apache software model and how editors work on Wikipedia articles. They then discuss the starfish self-organization of participants in the Burning Man festival. American lawyer Granville Sharp's decision to defend the freedom of a slave named Jonathan Strong leads him to connect with the Quakers and to advocate for the abolition of the slave trade. The authors use Sharp's story to illustrate five foundational principles called the Five Legs: 1) Circles; 2) The Catalyst; 3) Ideology; 4) The Preexisting Network; 5) The Champion. They apply
Starfish especially those at the tips of the rays, are also sensitive to chemicals, enabling the starfish to detect odour sources such as food. There are eyespots at the ends of the arms, each one made of 80–200 simple ocelli. These are composed of pigmented epithelial cells that respond to light and are covered by a thick, transparent cuticle that both protects the ocelli and acts to focus light. Many starfish also possess individual photoreceptor cells in other parts of their bodies and respond to light even when their eyespots are covered. Whether they advance or retreat depends on the species.