Theneed tochoosehowtoadapt tothefuturehighlights the choices-abouttownplanning, or forestry, or coastaldefences, orimmigration-that have shaped the present.
Ms Barrett-Brown also suggested that some large companies might choose to relocate to another country if an immigration cap left them short of the staff they needed.
He said that as a number of other major European countries such as Germany were also lifting immigration controls in 2013 it was difficult to assess which country Bulgarian and Romanian migrants might choose to go to.