Professor Niall Ferguson argues that Britain's decision to enter the First World War was a catastrophic error that unleashed an era of totalitarianism and genocide. Professor Niall Ferguson argues that Britain's decision to enter the First World War was a catastrophic error that unleashed an era of totalitarianism and genocide. Professor Niall Ferguson argues that Britain's decision to enter the First World War was a catastrophic error that unleashed an era of totalitarianism and genocide. Professor Niall Ferguson argues that Britain's decision to enter the First World War was a catastrophic error that unleashed an era of totalitarianism and genocide.