S 01 | Ep 54 The Role of Social Proof and Defaults in Influencing Consumer Choices Tim Ash joins the show to share lessons from two decades of applying evolutionary psychology to marketing and digital growth . Tim opens by explaining why neuromarketing is simply psychology applied to marketing , and why understanding how emotions drive decisions , rather than rational thinking , is the most important foundation any marketer can build . He argues that the rational brain never actually makes decisions on its own , it only supplies options that our emotional and subconscious systems rank and choose from , meaning that marketers who rely purely on data and features are fundamentally misunderstanding how people buy . Tim introduces the concept of the full customer journey as a sequence of micro - conversions , pushing back against the instinct to focus all energy at the bottom of the funnel and arguing that content supporting awareness and education , long before a company can make money , is where trust is won or lost . He discusses choice architecture , smart defaults , and social accountability as the most reliable tools for nudging lasting behavior change rather than one - time conversions .