Epiphenomenal

An organism's consciousness is epiphenomenal to its behavior, and its behavior is determined by unconscious calculations.

To this day, critics of materialism regularly recite the tenacious canard that the model crudely counterposes ‘economic’ factors to ‘culture, ideology and mentality’ […] That for materialism, thought is epiphenomenal froth. This is bogus.

There’s an intuitive belief that technology changes people, and the internet feels like an unusually straightforward example of this process. But it’s also possible that the relationship between the internet and the evolution of society was more epiphenomenal: It’s possible that society is always changing, and that the rise of the internet was a coincidental event that merely made that natural process more visible.

If qualia are epiphenomenal in the standard philosophical sense, their occurrence can't explain the way things happen (in the material world) since, by definition, things would happen exactly the same without them.