Document resource
In nature, herding reflects adaptive responses to environmental pressure. In predator-dense African savannahs, animals herd defensively for protection. In resource-scarce deserts, herding occurs around limited resources. Herding in oncology drug development reflects these same evolutionary pressures: defensive clustering around promising targets to reduce risk.1 The analysis by Zhang and colleagues2 provides an empirical test of when this adaptive strategy becomes maladaptive.