Could consciousness be a basic ingredient of the universe, like mass or charge?

Panpsychism says yes. On this view, consciousness doesn't switch on only inside complex brains. Some minimal form of experience is a basic feature of reality, built into matter itself. Not human thoughts or feelings, its defenders stress. Just a primitive flicker at the level of fundamental physics. A rock as a whole needn't be conscious at all.

The idea is old. Aristotle reports that Thales held "everything is full of gods," pointing to magnets. Plato called the world a living being with a soul. Reading those ancients as panpsychists is debated, though. The view peaked in the 19th century, faded in the mid-20th, and has returned this century. The reason is the hard problem of consciousness. If brain matter doesn't explain experience, maybe experience was there all along.

The philosopher Galen Strawson makes the modern case. A real physicalist holds that only physical things exist. Your experience is undeniably real. So experience must itself be physical. Critics are blunt. Many see panpsychism as "plain crazy," notes Anthony Freeman, a consciousness-journal editor. John Searle calls it strictly meaningless. Philip Goff replies that Einstein's and Darwin's theories were counterintuitive too.

The hardest problem is combination. If every particle carries a flicker of experience, how do countless flickers become one mind feeling one pain in one knee? No proposed answer has won wide acceptance. So panpsychism doesn't solve the hard problem. It moves it, from "why does matter feel anything?" to "why do small feelings add up to one?"