Through the various incarnations of Krypton, arrogance, as
SG-17 pointed out, is the common theme.
TV Tropes even names a trope after him due to this.
Byrne's
Superman: The Man of Steel origin, which I like the best and am most familiar with, presents a Krypton where Kryptonians have given up emotions, even more so than the Vulcans. Even though Jor-El knew the planet was dying (and had been for a long time), no one would abandon tradition and come up with an evacuation plan. Kryptonians had become so distant, they were repulsed by physical contact, that they could not come up with a way.
It was later revealed that Kryptonians were genetically tied to the planet. They could not leave without dying. Jor-El found a way to cure his unborn son of this and that was what saved Kal-El.
In the animated series, Brainiac served as the computer guiding Krypton. In this case, it's mainly Brainiac's arrogance, as he reasons if the ruling council knew about the planet's doom, they would force Brainiac into working on a solution. Brainiac figured that if no one knew, he could upload all of Krypton's information and escape. He went as far as making Jor-El a fugitive in order to distract the council and discredit Jor-El when he approached them.
What's interesting is how a few alternate reality situations where Krypton survived portray Jor-El as a lunatic. "For the Man Who Has Everything" had Jor-El kicked off the Science Council and it turns him bitter. He did fair better in the
Justice League Unlimited adaption of the episode, though.