The department of the interior was advised on racial matter by Robert c weaver this was important because he was?

Robert C. Weaver was the first African American to hold a position in the U.S. Cabinet, serving as the Secretary of Housing and Urban Development under President Lyndon B. Johnson. His role was significant because he provided crucial insights on racial issues, particularly regarding housing discrimination and urban development, which were pivotal during the Civil Rights Movement. Weaver's advocacy helped shape policies aimed at promoting racial equality and addressing the systemic injustices faced by African Americans in housing and urban planning.