>I don't see this as a reason for nihilism either, you can make a difference with your efforts - it just won't last forever (or even 1,000 years, let alone 10,000)
Can you really ‘invent’ fire, though? I think ‘discovering’ would be a more apt word. Maybe you can invent a specific way to make fire, such as rubbing sticks together, but evidently we don’t do that anymore.