Banksy is an anonymous, English based Graffiti artist, political activist and film director. His satirical street art and subversive epigrams combined with dark humour with graffiti, executed with a distinct stenciling technique. His works on socio-political commentary have been featured on the streets, walls and bridges of cities around the world. Banksy’s works had grew out of the Bristol underground scene, which involved collaborating with musicians and other artists. His style is similar to Blek le Rat, a Parisian stencil artist from the 80’s. Source

Banksy’s work also explores themes such as anti-war, anti-consumerism, anti-fascisim, anarchy, as well as critiquing the human condition like greed, poverty, hypocrisy, etc. His works rely on visual imagery and iconography to put his messages forward.

Trump, social media
Poverty, against Brexit
"Ozone's Angel"

Bus stops are far more interesting and useful places to have art than in museums. Graffiti has more chance of meaning something or changing stuff than anything indoors.

Graffiti has been used to start revolutions, stop wars, and generally is the voice of people who aren't listened to.
New Orleans, post hurricane Katrina

And Banksy has books too.
"Wall and Piece"; and "Banksy. You are an Acceptable Level of Threat and If You Were Not You Would Know About it. 4th Ed."Since I'm such a fan, I've got a lot of his artwork in this blog. Go to the Blogger logo at top left of your screen - in the search field, type in Banksy.