presumably due to the same reason that it's found biologically -- if you only have a hammer you'll find yourself caught with your pants down when you need to tighten a bolt.
Homogeneity can traditionally be attacked by exploiting a vector that the entire crowd is weak towards. Randomness helps to solve this problem on a macro level by varying the crowds weaknesses and strengths from individual to individual.
Homogeneity can traditionally be attacked by exploiting a vector that the entire crowd is weak towards. Randomness helps to solve this problem on a macro level by varying the crowds weaknesses and strengths from individual to individual.