One of the biggest questions humanity has wrestled with in regards to the existence of God is: "How can a just God, who loves everyone, simply sit back and let innocent people die (ie. the Holocaust, starvation, cancer, etc.)?"

Friedrich Nietzsche, a prominent philosopher of the 19th century, whose works still influence thoughts on religion and secularism today, was once quoted as writing "God is dead." His belief is that man had become so enraptured by science and "reason" that they felt no need for God in their society. Without anyone to believe in God, God, according to Nietzsche, had died.