Social sciences, sociology et al, can prove statistically that the virtues, honesty, transparency in social and financial affairs, education, compassion, devotion, loyalty, diligence, patience, kindness… I believe our science can prove such things are good for society. Religion is right, but also, religion is superfluous.
A country could, instead of putting religion in the Constitution, put instead values such as those stated above and support and sustain such a country with assurance that country is the best on earth.