I think of a large population of "decent", who generically never do anything outright bad (I realise this is probably inaccurate, I'm talking about intuitions). There's some variation within that category in terms of how much outright good they do, but that's a lot less important. And then a smaller but substantial chunk, say 10%, of "bad" people, people who do outright bad things on occasion (and some variation in how frequently they do them, but again that's much less important).