Lay theories of change refer to beliefs people hold about how events develop over time and are related to each other. This chapter reviews cultural differences in lay theories of change between East Asians and Euro-Americans/Canadians. The overarching theme from the existing research is that East Asians tend to believe more than Westerners that phenomena change in a cyclical way, whereas Westerners tend to believe that events are either relatively stable or develop in a linear fashion. This cultural variation is manifested in a wide range of predictions and decisions. Furthermore, Euro-North Americans are more likely than East Asians to hold linear beliefs about the correspondence between cause and effect in magnitude, and between appearance and reality (e.g., a strong appearance corresponds to a strong internal state). The chapter also discusses the cultural underpinnings of lay theories of change and directions for future research.