Naturalism and materialism are not similar philosophies though both take the outside world as their starting point. Materialism with its insistence of no existence beyond apparent matter, considers material progress as the pinnacle of being and in that it sees death as an anomaly which should be overcome by controlling the elements. It is also ironic to note that materialists should love death since matter cannot be created or destroyed — it merely transforms— and hence their hate of death is unfounded. But their dialectics can't be seen behind the shut eyes of death.
The dialectics can't allow a fully-satisfied end of life for the labors of one's life to him always remain hidden in their ultimate outcome.