I looked up Ian Duncan and Baltimore Sun. It appears as though Ian Duncan didn't write this and that it didn't appear in the Baltimore Sun.

Baltimore Sun Publishes “The Black Dilemma” Editorial – Incorrect Attribution!

Politics / By Rich Buhler & Staff / June 10, 2015

Summary of eRumor:

Forwarded emails and blog posts have cited an editorial titled “The Black Dilemma” that supposedly appeared in the Baltimore Sun.

The Truth:

The Baltimore Sun didn’t publish “The Black Dilemma” editorial. And it wasn’t written by a man named Ian Duncan Smith, as was reported in October 2017.
The editorial was published in September 2014 by American Renaissance, a website that says it approaches “the problems of race” with “race realism.”
Anthony Bryan, described as an engineer and entrepreneur who lives in “Whitetopia,” wrote the editorial, which is actually called “Ten Percent is Not Enough.”.