title: From 'circumstances' to 'environment': Herbert Spencer and the origins of the idea of organism-environment interaction.
authors.affiliation: Conceptual and Historical Studies of Science, University of Chicago, Social Sciences 205, 1126 East 59th Street, Chicago, IL 60637, USA. trpearce@uchicago.edu
authors.forename: Trevor
authors.initials: T
authors.lastname: Pearce