This is also the basic principle of the survival and growth of any civilization and it is also the basis of ancient Indian philosophy. All the Western countries realized this and they also became secular. This is pure common sense. To live we first need food, water, shelter which means, agriculture, farming, housing, sanitation, ecology, water distribution. Then we have floods, earthquakes, cyclones. We need to protect from those. Hence, we make best use of education, economics, science, technology to correct and make systems better & robust. We need to maintain them as it decays. In good times, we spend time in music, art, sports and it keep our mind and body more healthy. We pursue medicine and create insurance plans etc.