Complex sentence: Through "The Meaning of Death", Feifel was able to lay the foundation for a field that would eventually be known as Thanatology, which would improve death education and grief counselling by the use of valid death-related data, methodology and theory.
Split into simpler sentences: Through "The Meaning of Death", Feifel was able to lay the foundation for a field that would eventually be known as Thanatology. The field was to improve death education and grief counselling by the use of valid death-related data, methodology and theory.