Shocks are external, short-term deviations from long-term trendsdeviations that have substantial negative effects (which may be short-lived or long lasting) on peoples state of well-being, level of assets, livelihoods, safety, and ability to withstand future shocks. Many shocks are unexpected, but in some cases, such as drought or conflict, the shock may be expected year after year although the individual, community, or system lacks the resilience to prepare for or mitigate it. In other cases, such as climate change, the general shock could be expected but the effect on a particular individual, community, or area could be unexpected.
This brief examines five types of shocksconflicts, natural disasters, climate change, food price volatility, and health crisesas they relate to food safety and agriculture. It assesses their frequency, severity, or both during the past few decades as part of a selective, nonsystematic review.