Because this is our story too. Because we are in a slightly better position than our forebears to contribute to the moiseless revolution in things that really count. We have made a beginning. We have gained a precious inch in the right direction. We rejoice in our material advances, yes, but we know that a mushroom-shaped cloud can wipe these out in a moment.
Ideas are more durable.
From our hilltop of 1859, we can see that these, indeed, are cause to celebrate.