"Philosophers have sought to understand the world. The point, however, is to change it." Activist philosophy from the grand old man of the Red Menace, Karl Marx. Also available as a poster. Unless otherwise noted, our greeting cards are 5x7 inches and blank inside for the customer's any-occasion personal message. Cards are on 12pt stock with a coated front and are uncoated inside for easy writing. White A7 envelopes are included.