You've been posting this sentiment a lot, lately, and, while there are certainly benefits to two parents in the home, it is a dramatically more complex issue than you're making it. First, there is research that suggests the benefits of a two-parent home are significantly less apparent in the black community.
New research indicates that access to resources, more than family structure, matters for black kids’ success.
www.nytimes.com
Second, even with a higher percentage of single-parent (usually the mother) homes, black fathers are actually more involved in their kids' lives than those of other races.
The inaccurate perception that African American families are devastated by absent fathers that need to return to their responsibilities informs policy and law formulation in a variety of harmful ways.
www.chicagoreporter.com
Finally, underlying your point is an implication that it's black people's own fault they aren't as upwardly mobile as white people. If only they'd get married, like everyone else, they'd have all the same opportunities, which simply isn't true. Even if it were, your premise holds children accountable for what you view as the "sins" of their parents. Before my position is misrepresented, I'm not arguing against the importance of parenting, but there's no reason effective parenting can't come from any number of family models