History associates the second voyage of the Beagle with the field research that led Charles Darwin to formulate his theory of evolution. This voyage also led to tragedy for Captain Robert FitzRoy and ``Jemmy Button,'' a Tierra del Fuegian Indian who had been ``civilized'' in England under FitzRoy's guidance and who was later implicated in the massacre of a group of English missionaries. These events serve as a metaphor for author Marks, who believes the Victorian era's social and religious conformity explains Darwin's reluctance to publish his theory and accounts for the storm of anti-evolutionary reaction among scientists and social and religious leaders, including Darwin's one-time mentor FitzRoy. While shedding light on forgotten historical events, this is an inconclusive and somewhat unfocused book. Marks speculates on but cannot ultimately document the motivations of the principal characters, nor does he offer his own conclusions about the significance of the events he recounts. This is for larger, more comprehensive library collections dealing with social and scientific history.-- Laurie Tynan, Montgomery Cty.- Norristown P.L., Pa.