Who Are the Four Horsemen of the Apocalypse?

Some want to know the future for the personal advantage it can provide, others seek it out of fear. The world today is full of anxiety. But few stories in history or literature garner as much interest as works that lay claim to predicting the future. The four horsemen of Revelation, also known as the four horsemen of the apocalypse, are one of the greatest subjects of speculation in scripture. Who are these four horsemen?