Esophageal varices are swollen veins in the lining of the lower esophagus near the stomach. Gastric varices are swollen veins in the lining of the stomach. Swollen veins in the esophagus or stomach resemble the varicose veins that some people have in their legs. Because the veins in the esophagus are so close to the surface of the esophagus, swollen veins in this location can rupture and cause dangerous bleeding. Esophageal varices almost always occur in people who have cirrhosis of the liver. Cirrhosis causes scarring of the liver, which slows the flow of blood through the liver. Scarring causes blood to back up in the portal vein, the main vein that delivers blood from the stomach and intestines to the liver.
General strain theory is a theory of criminology developed by Robert Agnew. Robert Agnew's General Strain Theory is considered to be a solid theory, and has accumulated a significant amount of empirical evidence, and has also expanded its primary scope by offering explanations of phenomena outside of criminal behavior.
Social strain theory, also known as value-added theory, proposes six factors that encourage social movement development: 1  structural conduciveness - people come to believe their society has problems. 2  structural strain - people experience deprivation.