I like opinion pieces like this that challenge conventional wisdom. Most hydrologists identify closer to the geophysical realm than to the biological, which makes sense because water is not sentient. However, water differs from minerals in the degree to which it dynamically interacts with every living thing in a catchment. One could impute a ‘purposefulness’ to water as it serves its various functions, where that ‘purpose’ is enabled by living things that in turn affect control over their own destiny. Perhaps it is time to consider the function of water in the environment as something in between animal and mineral in terms of capacity for self-determination.