In his memoir, Gerstner described the turnaround as difficult and often wrenching for an IBM culture that had become insular and balkanized. After he arrived, over 100,000 employees were laid off from a company that had maintained a lifetime employment practice from its inception. Long allowed by their managers to believe that employment security had little reference to performance, thousands of IBM employees had grown lax, while the top-performing employees complained bitterly in attitude surveys. In the goal to create one common brand message for all IBM products and services around the world, under Gerstner's leadership the company consolidated its many advertising agencies down to just Ogilvy & Mather. Layoffs and other tough management measures continued in the first two years of his tenure, but the company was saved, and business success has continued to grow steadily since then.