The accusations against Clarence, Stephen, Gull and Druitt also draw on cultural perceptions of a decadent ruling class, and depict a high-born murderer or murderers preying on lower-class victims. Because Druitt and the other upper-middle-class and aristocratic Ripper suspects were wealthy, there is more biographical material on them than on the residents of the Whitechapel slums. Consequently, it is easier for writers to construct solutions based on a wealthy culprit rather than one involving a Whitechapel resident. There is no direct evidence against Druitt, and since the 1970s, the number of Jack the Ripper suspects has continued to grow, with the result that there are now over 100 different theories about the Ripper's identity.