7 social processes that great the slippery slope of evil:
- Mindlessly taking the first small step.
- Dehumanisation of others.
- De-individualisation of self (anonymity / being part of a crowd).
- Diffusion of personal responsibility.
- Blind obedience to authority.
- Uncritical conformity to group norms.
- Passive tolerance of evil through inaction, or indifference.
From Ted: http://www.ted.com/index.php/talks/philip_zimbardo_on_the_psychology_of_evil.html