Let's say whatever I do has no impact on the future what so ever. Can this statement be true?
If I speak to another and pass on to them a theory, this made or constructed by me from information collected from others over a period of time.
Therefore others thoughts, theories combined are already formed before I exist. I am merely an instrument to pass on the same or modified ideas and rules.
Therefore we are all important in some way to form the future of time itself.