What if God was true, but on a limited basis? This would be a cause for great concern; however, this is quelled by the fact that He is both true and faithful.
Sin withholds good things from man that he would otherwise have opportunity to enjoy. Instead of peace, sin brings unrest, frustration, and heartaches.
Nations have only been great so long as they resembled a nation submitted to God. When a nation forsakes the Lord, He will forsake that nation.