They were the Trel Naskari...a truly advanced and enlightened race. Amongst them, none lacked for the necessities of life. All dwelt in peace and prosperity and had for a very long time.
Art, music, literature, philosophy, science had all been elevated to their highest forms and the Trel Naskari rejoiced in their enlightenment.
In the 17th Millennia, the first traces of concern manifested. The people began to obsess over all that would be lost should some cataclysmic event lay their world to waste. Their achievements and accomplishments would be lost forever. They would be forgotten and unmourned. This must NOT be allowed to happen.
Great shining capsules would be built and launched to the farthest corners of the galaxy. Each would contain a crystalline archive of the Trel Naskari civilization. Their world would survive in perpetuity as a shining gem for all to remember.
This endeavor sealed the fate of the Trel Naskari more finally than any cataclysm could have. Squabbles became open conflicts as each faction clamored for their data to be saved first.
In the end, naught but smoldering debris remained of this once-proud people. Their legacy snuffed out and left to lie amongst the ashes of obscurity forever.