Interlude: The Cluster of Plasticity and the Impact of Its Transfer

I explicate the cluster of concepts related to plasticity, which are deployed as an inseparable conceptual bundle: ‘environment/milieu’ tropes, e.g., environmental change, effect, interaction with, adaptation to; use and disuse; learning; habit. This cluster, the crystallization of which is discussed in the chapters on Lamarck and Spencer, runs through all chapters