Environmental stressors across time: historical insights and contemporary challenges

This special issue of The History of the Family investigates how environmental and social stressors shape human biology, behaviour, and demographic outcomes across historical populations. Stress, understood as the body’s nonspecific response to challenges that disrupt internal equilibrium, emerges from events such as wars, epidemics, famines, natural disasters, and socioeconomic crises. When experienced during critical developmental windows, particularly in prenatal life, stress can modify growth trajectories, physiological functions, and long-term health profiles, often producing intergenerational effects. Historical evidence presented in this issue demonstrates these dynamics. Epidemics in nineteenth-century Poznań, Transylvania, and the Ottoman Empire significantly altered marriage patterns and mortality structures, while fluctuations in the secondary sex ratio at birth reflected complex interactions among maternal conditions, social environments, and reproductive biology. In western Catalonia, the agrarian depression of the late nineteenth century triggered convergence in adult stature, with individuals from lower-status groups catching up to those from higher-status backgrounds. In Bohemia, increased mobility among elite families corresponded with reduced child survival, revealing how environmental and structural constraints may override social privilege. Collectively, the studies highlight the complexity, heterogeneity, and context dependency of human responses to stress. These historical insights resonate strongly with contemporary concerns: modern stressors, including climate change, environmental degradation, and armed conflict, continue to shape infant health, survival, and social inequality. By integrating biological, demographic, and social perspectives across past and present, this issue underscores the cumulative and multifactorial nature of environmental stress and its socially differentiated impacts. Such interdisciplinary approaches offer valuable guidance for public health, social policy, and resilience-building strategies in the twenty-first century, demonstrating how environmental and social stressors influence growth, reproduction, survival, and family dynamics, while revealing both human vulnerability and resilience.