Workplace stress is the harmful physical and emotional response that occurs when there is a poor match between job demands and the capabilities, resources, or needs of the worker. A variety of factors contribute to workplace stress such as negative workload, isolation, extensive hours worked, toxic work environments, lack of autonomy, difficult relationships among coworkers and management, management bullying, harassment and lack of opportunities or motivation to advancement in one’s skill level.

Stress-related disorders encompass a broad array of conditions, including psychological disorders (e.g., depression, anxiety, post-traumatic stress disorder) and other types of emotional strain (e.g., dissatisfaction, fatigue, tension, etc.), maladaptive behaviors (e.g., aggression, substance abuse), and cognitive impairment (e.g., concentration and memory problems). In turn, these conditions may lead to poor work performance, higher absenteeism, less work productivity or even injury. Job stress is also associated with various biological reactions that may lead ultimately to compromised health, such as cardiovascular disease, or in extreme cases death.

Allen Klein (December 18, 1931 – July 4, 2009) was an American businessman, talent agent and record label executive. His clients included The Beatles and The Rolling Stones.

Allen Klein was born in Newark, New Jersey, the son of Jewish immigrants from Budapest, Hungary. His father was a butcher by trade, and his mother died before his first birthday. As a teenager, he worked in several jobs while attending evening classes. He excelled at mental arithmetic, and graduated from Upsala College, East Orange, New Jersey, in 1956.

He undertook bookkeeping for several people in showbusiness, and audited record companies. In 1957 he began his own business, a partnership with his wife Betty. Record industry insiders began to fear his blunt-speaking tenacity, and well-placed people began to recommend him. Klein regarded himself as a shrewd and tenacious businessman, exampled by him having a modified Bible quote on his desk, reading: "Though I walk in the shadow of the valley of evil, I have no fear, as I am the biggest bastard in the valley."