What is a Righteous Nation?

What does it mean that righteousness exalts a nation?
Who alone is righteous in God's eyes? What nations does God prosper and why? How does the LORD care for the righteous before Him? What is the difference between earthly morality and righteousness? How were all the families of the earth blessed by God's promises to Abraham and his Seed (Christ)? Where can true peace, love and joy be found? Where must you be found to have eternal Life? Whom does the King favor?