I keep this exact issue of Shakespeare's Complete Works next to my computer. It is beautiful to behold.
Shakespeare was a mastermind. He is the best-known playwright ever to have lived. There is a reason Romeo and Juliet are still the world's most famous couple. The beautiful poetry, the intricately woven plot, make this play a complex work of art. There are perhaps the most renderings of Romeo and Juliet of any other literary work in the world. Ballets, movies, musicals, you name it.
I am firmly of the opinion that William Shakespeare was the brain behind the many plays and sonnets written by who the world knows as Shakespeare. It was definitely not a nobleman, however educated said nobleman may have been. It takes a common man to write out a true understanding of human nature. I would compare Shakespeare to Emily Bronte in this particular situation. She wrote Wuthering Heights when she was only sixteen. That classic novel is a prime example of what people truly are like inside. If a sixteen-year-old girl wrote that, why couldn't a merchant have penned countless plays and sonnets? Think about it.