Blue collar jobs refer to wage-earning jobs that involve manual labor or wearing specialized clothing, such as farming, carpentry, and masonry. Throughout history and up until WWII, most people relied on blue collar jobs. During WWII, many men left for war so women entered the workforce in factories, expanding America's industrial production. After the war, the GI Bill helped many veterans attend college and pursue white collar careers. However, statistics show that blue collar workers still make up the majority of the workforce and many blue collar jobs pay comparably or better than some white collar occupations. Blue collar work also tends to be more stable as essential services will always be needed.