 Unable to convince his associates to abandon tradition and consider escape, and reasoning that modern Kryptonian society had grown cold, unfeeling and sterile, Jor-El removed the Eradicator's planetary binding genes from his unborn son Kal-El's genetic pattern, took Kal-El's birthing matrix and attached a prototype interstellar propulsion system to the vessel.Just as the planet began to shake apart, he launched the matrix towards Earth, where it would open and give birth to the infant upon landing (the Post-"Crisis" Superman therefore was considered to be technically "born" on Earth).Jor-El was not only determined that his son would survive the death of his birthworld, but that he would grow up on a world that vibrantly embraced living, as his forebears once did.