Psychological Studies

"Territory." (here)

The do-gooding Esperancians want to save the planet t'Kela from imminent uninhabitability and, for this purpose, they need the cooperation of all t'Kelans. However:

"'...our mission has been so busy gathering planetographical data that we never found time to do psychological studies in depth.'" (p. 28)

Van Rijn will point out that cooperation with t'Kelans to save t'Kela requires both planetography and psychology from the outset. Some t'Kelans suddenly attack the human base and Joyce Davisson has no idea why. However, unpredictable, apparently irrational and inexplicable, actions by aliens are always a possibility especially if no one has prioritized understanding their mentalities and motivations in the first place. 

When van Rijn assembles his first trade pioneer crew, that team will consist of:

one human Master Merchant;

one Wodenite plantographer;

one Cynthian xenobiologist. 

Three species deploy a broader perspective. A merchant and a biologist should be able to piece together the psychology. If not, then a fourth specialist is required.