$"$In the age of rapid technological advancement, global market dynamics, and increasing demands for corporate social responsibility, how have the roles and expectations of managers and leaders evolved in contemporary organizations? Compare and contrast the leadership and management practices of the past with those required in the $21$st$-$century workplace. Consider factors such as communication tools, workforce diversity, remote work, and ethical considerations."

The "glass ceiling" is a metaphorical barrier that prevents certain demographics, particularly women and minorities, from advancing to top leadership positions within organizations. Despite notable progress, many studies indicate that the glass ceiling remains a reality in various sectors and industries.

Question: In the context of modern management and leadership theories and practices, to what extent is the glass ceiling influenced by organizational structures, cultural norms, and biases? How have contemporary organizations addressed this issue, and what strategies can be employed to break this ceiling more effectively?