Texts on the subject of Panpsychism – the view that sentience is universal, from Man to molecule and more.
Click on titles below:

Sjöstedt-H, Peter (2018): Panpsychism: Three Reasons Why our World is Brimming in Sentience [with audio-visual version, here]
Strawson, Galen (2015/16): Mind and Being: The Primacy of Panpsychism
Sjöstedt-H, Peter (2015): Panpsychism – Introduction [notes]
Sjöstedt-H, Peter (2015): A Conspectus of A. N. Whitehead’s Metaphysics
Strawson, Galen (2006): Realistic monism: why physicalism entails panpsychism
Nagel, Thomas (2002): A Psychophysical Nexus
Nagel, Thomas (1979): Panpsychism
Paulsen, Friedrich (1895): Arguments for Panpsychism. In his Introduction to Philosophy
Edwards, Paul (1967): Panpsychism. Entry in Encyclopedia of Philosophy, 1967
Hartshorne, Charles (1978): Physics and Psychics: The Place of Mind in Nature
James, William (1909): Concerning Fechner. In James’ A Pluralistic Universe