J. Hector St. Jean de Crevecoeur's "Letters from an American Farmer"

disinterestedness

dis·​in·​ter·​est·​ed·​ness (ˌ)dis-ˈin-trə-stəd-nəs  
-ˈin-tə-ˌre-,
 
-tə-rə-,
 
-tər-;
 
-ˈin-ˌtre-

Noun

the quality or state of being objective or impartial

Source