Humor is mankind’s greatest blessing. Mark Twain… Humor is mankind’s greatest blessing. — Mark Twain Tags: #Greatest, #Blessing, #Mankind, #MarkTwain, #American, #Author Mini who’s who: Mark Twain : American Author Born: November 30, 1835 Died: April 21, 1910 Let us help you with humor is mankind’s greatest blessing. mark twain… today! Submit a Comment Cancel replyYou must be logged in to post a comment.