Since the time when humans used to live in caves, wood was the major source of fire or rather heat. People would turn to wood for warmth, cooking, and safety. As, we started getting more advanced from we started using different ways to provide heat but by using the same fuel which was wood.
Wood-fired stove was the centerpiece of many kitchens. This was before the introduction of other fossil fuels which were not known to us, can be used for heating as well. And, also before