How did the Sierra Club become a national force that could challenge and stop federally sponsored projects, like the one that would have damned the Colorado River and destroyed hundreds of miles of wilderness? Many cite the leadership and vision of David Brower.

Known as the father of the modern environmental movement, Brower was admired for his tireless, passionate and unyielding devotion to nature. To detractors, he was contentious and polarizing.

Journalist and professor Robert Wyss has spent the last five years studying Brower and his life’s work. His research has led to a new book, “The Man Who Built the Sierra Club, A Life of David Brower.” Wyss will be speaking at Time Tested Bookstore in Sacramento tomorrow. Today, he joins us on Insight to talk about Brower and his legacy with the Sierra Club.