The first three chapters of the book make a forceful argument for the latter view, especially as applied to living beings. Special attention is given to organisms and lineages as processes, the latter being the processes in which evolution occurs. Lineages generate organisms, but organisms compose lineages, illustrating the deep hierarchical interconnections of the world of process. The interconnectedness of life is amplified with an extended consideration of the omnipresence of symbiosis, and some reflections on the processual character of the pregnant mammal.

The final three chapters of the book apply the processual view of nature to problems more specific to the human. A starting point here is the uniqueness of the human lineage, in respect of its sociality and behavioural plasticity, which together enable a unique division of labour, and also in respect of the extent and complexity of the niche that humans have constructed for their occupation. It is shown that the processual perspective on the human organism and lineage offers surprising and radical insights into topics including the nature of personal identity, the possibility of indefinite life extension, human nature, human classifications (including those provided by race and gender), and freedom of the will.