Why is it that the life-span of the modern man is so short as compared to that of his ancestors?

Our ancestors used to have a well-regulated, disciplined life. They were not slaves of
their senses as the modern people are. They used to do Japa, Pranayam, Sandhyavandana
(Trikala) and Svadhyaya (study of religious books like the Gita, the Bhagavata and the
Ramayana). They used to do charity and selfless service, and observe Vratas like Ekadasi, Sri
Rama Navami, Sri Krishna Ashtami and Dattatreya Jayanti. They used to conduct spiritual
conferences and pray for world peace and not for their own… http://bit.ly/cLcefw