We’ll start today’s show with a history of conspiracy theories from colonial America to the current War on Terror. J. Maarten Troost describes leaving rehab and gradually reawakening to life as he retraced the journey that Robert Louis Stevenson made through the South Pacific. Novelist Jane Gardam talks about Last Friends, the final installment in the Old Filth trilogy. We’ll talk to the inventor of a new technology that turns our trash into energy. Plus, find out why Doctors Without Borders is pulling out of Somalia and what its staff is seeing in Syria after the alleged chemical attack over the weekend.