Yes, "liberal" and "conservative" are relative, not absolute terms. There's a concept known as the Overton Window which describes exactly this shift of what is considered the "center" and what is considered a radical left/right position in any given society at any given time.

The idea that people should vote for their representatives, for example, was once considered an extremist take that could ruin civilization itself if implemented. The Overton Window shifted and nowadays even most Fascists will at least pretend in public to agree with it.