Oliver Sweet is one of the world's leading business anthropologists. He works with brands like Coke, Ikea, Google and Dyson, as well as local councils and national governments, to reveal the secrets behind our decision making.

Why do we do what we do? We might think it's our unique personality and individual differences that guide our choices, but more often than not, it's actually culture shaping our behaviour. From the ways we bring up children to the products we buy, the culture we live in creates who we are.

In The Rules That Make Us, business anthropologist Oliver Sweet reveals the secrets to successful people-watching and how we can better understand consumers, voters and our relationships. His decades-long, trailblazing work uses cultural insights to help businesses, governments and NGOs achieve their goals - whether he's working with the Gates Foundation to encourage South African men to get HIV tests, helping a pet food company break into a new market in Brazil, or researching why 'nudge' techniques often backfire.

Drawing on research conducted in thirty-five countries, Sweet maps culture's hidden rules: how they govern our behaviour, create our assumptions, even how they help us predict the future. The Rules that Make Us gives us a model for thinking about culture that reveals a new way of understanding our families, colleagues, customers and ourselves.