In a lengthy feature article this week, Fortune's Polina Marinova chronicled the downfall of Kleiner Perkins Caufield & Byers, once the premier venture firm in Silicon Valley. Marinova reports that part of the firm's downfall was high turnover by some of the firm's most up-and-coming investors. Some of Silicon Valley's most prominent venture capital firms were started by former Kleiner Perkins investors, including Khosla Ventures and Defy Partners. Visit Business Insider's homepage for more stories.