Krsna says in Bhagavad-gita (13.9) that the real sufferings of the material world are four-janma-mrtyu jara-vyadhi (birth, death, old age and disease). In the history of the world, no one has been successful in conquering these miseries imposed by material nature. Prakrteh kriyamanani gunaih karmani sarvasah [Bg. 3.27]. Nature (prakrti) is so strong that no one can overcome her stringent laws. So-called scientists, philosophers, religionists and politicians should therefore conclude that they cannot offer facilities to the people in general. They should make vigorous propaganda to awaken the populace and raise them to the platform of Krsna consciousness. Our humble attempt to propagate the Krsna consciousness movement all over the world is the only remedy that can bring about a peaceful and happy life.

Srila Prabhupada, SB 7.9.19, purport