Often regarded as William Shakespeare’s crowning achievement, “King Lear” is a tragedy about the relationship between parents and their offspring and shows how quickly relatives can become blinded by fear and killed with love. “King Lear” will run until Dec. 1 at The Shakespeare Tavern in Atlanta. Performances will be at 7:30 p.m. Thursdays, Fridays and Saturdays; 6:30 p.m. Sundays; and 10 a.m. most Tuesdays and Wednesdays.