This paper examines the impact of exposure to violent conflict on social, risk, and time preferences using field experiments in Burundi. The study finds that individuals exposed to violence display more altruistic behavior, are more risk-seeking, and have higher discount rates. These findings suggest that conflict can significantly alter savings and investment decisions, with potential long-term consequences. The research also highlights the importance of endogenous preferences in economic theory, challenging the traditional view that preferences are fixed. The study uses a series of field experiments to measure these preferences, finding that conflict affects behavior in both individual and community levels. The results are robust across different specifications and are supported by both experimental and observational data. The paper concludes that conflict can have complex effects on development, potentially leading to both negative and positive outcomes depending on the context. The findings suggest that postwar recovery processes may be more nuanced than previously thought, with conflict potentially contributing to social capital and economic growth through changes in preferences and behavior. The study underscores the need for further research into the mechanisms through which conflict affects economic behavior and development.This paper examines the impact of exposure to violent conflict on social, risk, and time preferences using field experiments in Burundi. The study finds that individuals exposed to violence display more altruistic behavior, are more risk-seeking, and have higher discount rates. These findings suggest that conflict can significantly alter savings and investment decisions, with potential long-term consequences. The research also highlights the importance of endogenous preferences in economic theory, challenging the traditional view that preferences are fixed. The study uses a series of field experiments to measure these preferences, finding that conflict affects behavior in both individual and community levels. The results are robust across different specifications and are supported by both experimental and observational data. The paper concludes that conflict can have complex effects on development, potentially leading to both negative and positive outcomes depending on the context. The findings suggest that postwar recovery processes may be more nuanced than previously thought, with conflict potentially contributing to social capital and economic growth through changes in preferences and behavior. The study underscores the need for further research into the mechanisms through which conflict affects economic behavior and development.