None say it Better Than "The Great Burns"

 

Man's Inhumanity to Man

by Robert Burns 

 

Many and sharp the numerous ills
Inwoven with our frame;
More pointed still, we make ourselves
Regret, remorse and shame;
And man, whose heaven-erected face
The smiles of love adorn,
Man's inhumanity to man,
Makes countless thousands mourn. * 

 

* https://www.poetrynook.com/poem/mans-inhumanity-man