"The inhabitants of the rainforest must be allowed to speak for themselves," wrote Bruno Manser in 1992. At first glance, a European living with the Penan of Sarawak may have seemed like a quaint curiosity, but Manser was careful to redirect public attention to where it was most needed – the plight of his adopted people, beleaguered by human rights abuses and the destruction of their home.Voi…