You don't think so? Then, dear friend, you delude yourself. If making this world a better world, whatever that means, entails doing what you can when you're here, well, all of that can be undone very easily. Much of what has happened in history was readily outwitted by events after the principals had died. But it won't matter to you any way you slice it. You will be out of existence, with no say in the matter. Your work, your life, will disperse into the mists of history, wafting away as the steam from your morning coffee. No one will notice, at least least once your generation passes. And you too will be forgotten. Every nonentity will be released from memory. Everyone's memory.
You fight for freedom, eh? Yours, or someone else's? As it is, that indeed may serve you well. While you're here. If we leave everyone else alone you can be left alone. It sounds profound. Annoying profound, perhaps, because it really stands for nothing more than what you want. If there is nothing beyond your human frame, then what you want seems rather petty, if you give it a moment's thought. It's nothing but a great sounding idea tied to a caramel latte. It seems great, yet is quickly gone. Freedom within decay, freedom with no bounds or construct, isn't freedom. It is at best reaction to nothing more than animal desire.
We aren't pessimists. We're optimists. But we can't help but see our atheistic, agnostic friends as naive at best. We feel that their philosophy, whether freedom loving or socialistic, must at its root be pessimistic because it isn't based on anything but what they happen to want, for their own selfish pleasures. If that isn't the basis for pessimism, what is?
In the meantime, we will keep trying to do what is right because its right. We will keep believing in people because they have a dignity which is beyond modern times. It is there because, one way or another, people last forever. If you can't believe that, well, don't believe it. It's your funeral.