In part two of Campaign Nation, SMU Behavioural Sciences Institute Director Professor David Chan explained that from the 1960s to the 1990s there were many national campaigns that were explicit and "in your face" because there was a need to change behaviors very quickly. Today it is no longer effective to do it so explicitly, and a multi-faceted approach is needed. The purpose of a campaign and what behaviors are to be changed probably cannot be determined only by government alone – the values of the society should be determined by everyone in the society.