Did William Shakespeare write his works himself?

There are some existing theories that William Shakespeare did not write some of the plays and sonnets that have historically been attributed to him. Most of these are not generally accepted by Shakespeare scholars or historians of the Elizabethan/Jacobean era, but they still exist, and the topic remains one that receives serious inquiry by some researchers. (In other words, it is not exactly a "conspiracy theory" on par with a faked lunar landing). Some theories...

There are some existing theories that William Shakespeare did not write some of the plays and sonnets that have historically been attributed to him. Most of these are not generally accepted by Shakespeare scholars or historians of the Elizabethan/Jacobean era, but they still exist, and the topic remains one that receives serious inquiry by some researchers. (In other words, it is not exactly a "conspiracy theory" on par with a faked lunar landing). Some theories have posited famous figures like Francis Bacon as the "real" author of Shakespeare's works, while others point to lesser-known, or even unknown authorship. Still others question the authorship of only a handful of Shakespeare's body of work. To be clear, though, most people who study Shakespeare and his world--that is to say, most professional scholars agree that William Shakespeare, who was born and raised in Stratford-upon-Avon, and who worked mostly in London as an actor and a playwright, wrote all of the plays that have been traditionally attributed to him. So in the absence of compelling evidence, Shakespeare's authorship remains largely undisputed by scholars. In any case, his works are studied more for their content than for anything interesting about their author's life.