People's actions matter, but there are things happening and events that will happen that nobody can stop, that nobody can even fathom of happening or has happened.
This is the bottom of the rabbit hole where you pop out onto the other side.
Whether you believe in it or not, that's up to you.
The fact that we're all here, alive in this…system is proof enough that our fate is ultimately entwined and a part of something much bigger than us.