It has been available even in the most mundane of life situations to show you right from wrong, good from bad, friend from foe.

形容词最高级具有名词功能，在本句作介词 in 的宾语。后面接 of 说明“整体部分关系”，可以不要。

形容词最高级具有名词功能，可以作主语、宾语或表语。例如：

Of all the lessons taught by the financial crisis, the most personal has been that Americans aren’t so good at money-management. 在金融危机给人们的所有教训中，最涉及个人的（教训）是美国人不那么擅长理财。

Courage is the most important of all virtues.  勇气是所有美德之首。

It was done with the best of intentions.  是出于一片好心才这样做的。

She is the most famous of all American movie queens.  她是全美最著名的影后。

After Taiwan, Hainan is the largest of all our islands.  除了台湾，海南是我国最大的海岛。