Does anyone know any artists that focuses the work on the theme isolation or exlcusion?

i am doing my a level exams art and i have chosen to study on the theme of exclusion but i only know only artist that studys exclusion i need to find more artist so that i can interpret their work in my own way but i can seem to find any. can anyone help pleaseDoes anyone know any artists that focuses the work on the theme isolation or exlcusion?
Frida Kahlo The Broken Column


http://z.about.com/d/arthistory/1/0/0/c/鈥?/a>





Giorgio De Chirico paintings


http://www.uh.edu/~englmi/i/franzRoh/fra鈥?/a>


http://www.tate.org.uk/tateetc/issue9/im鈥?/a>





Edward Hopper paintings


http://mural.uv.es/carbomar/Hopper.jpg


http://images.artnet.com/images_US/magaz鈥?/a>





Andrew Wyeth Christina's World


http://literatehousewife.files.wordpress鈥?/a>

almay