"Multipliers: How the Best Leaders Make Everyone Smarter" is a book by Liz Wiseman that explores how effective leaders, referred to as "Multipliers," enhance the intelligence and capabilities of their teams. These leaders create an environment where team members feel empowered to contribute ideas and take ownership of their work, leading to increased productivity and innovation. In contrast, "Diminishers" are leaders who stifle creativity and limit the potential of their teams by micromanaging and controlling. Wiseman's research highlights the importance of fostering a culture of collaboration and trust, ultimately demonstrating that great leadership can amplify the collective intelligence of an organization.