Entangled Life

Merlin Sheldrake argues that fungi are not a marginal kingdom sitting between plants and animals but one of the organising forces of life on land, and that studying them unsettles assumptions we rarely examine — about individuality, intelligence and where one organism stops and another begins.

The mechanism running through the book is the mycelial network. Fungi grow as branching threads that explore space, fuse, redirect resources and dissolve their own tissue to rebuild elsewhere, solving problems without a brain or a centre. From there Sheldrake moves through mycorrhizal symbiosis, in which fungi trade soil phosphorus and nitrogen for plant carbon and have done so since plants first colonised land; lichens, which are composite organisms and forced biologists to rethink what a species is; yeasts and fermentation; and fungi that alter animal behaviour, including psilocybin and the ant-infecting Ophiocordyceps. The recurring claim is that fungal life is relational rather than individual.

It is for readers who want serious natural history written well — anyone interested in ecology, soil, food, or the broader question of how non-neural systems process information. It is not a health book and makes no clinical claims.

On the evidence: the underlying mycology is current and Sheldrake is unusually explicit about which parts are established and which are his own speculation, which is a mark of a careful writer. One caveat matters. The popular framing of forests as wired together by a resource-sharing wood wide web has drawn substantive criticism from ecologists who argue that the field evidence for widespread, directed transfer between trees is thinner and more equivocal than the public account suggests. Sheldrake is more measured than the headlines the idea generated, but readers should treat common mycorrhizal network claims as live science under revision rather than settled fact. The book's value is a better mental model of biology, not a protocol.