Readers of Shakespeares greatest tragedies have long noted the absence of readily explainable motivations for some of Shakespeares greatest characters: why does Hamlet delay his revenge for so long? Why does King Lear choose to renounce his power? Why is Othello so vulnerable to Iagos malice? But while many critics have chosen to overlook these omissions or explain them away, Millicent Bell demonstrates that they are essential elements of Shakespeares philosophy of doubt. Examining the major tragedies, Millicent Bell reveals the persistent strain of philosophical skepticism. Like his contemporary, Montaigne, Shakespeare repeatedly calls attention to the essential unknowability of our world.In a period of social, political, and religious upheaval, uncertainty hovered over matters great and smallthe succession of the crown, the death of loved ones from plague, the failure of a harvest. Tumultuous social conditions raised ultimate questions for Shakespeare, Bell argues, and ultimately provoked in him a skepticism which casts shadows of existential doubt over his greatest masterpieces.