The primary purpose of this book is to demonstrate the relevance of the network properties of the pore-space in the soil to the organisation of understanding of plant growth, soil formation, river network development, and the water cycle, with the ability to directly relate time scales from seconds to the cycle of supercontinent break-up and assembly (Wilson Cycle). In the process, implications regarding the viability of the strong vs. the weak (Earth only acts like a living organism) Gaia hypotheses can be addressed.