How does the boss decide who is next to be let go?

How does one go about selecting who will be downsized and who won't? Do you like how we have transitioned from who get's fired to who will be downsized? A much softer term for those who are facing the ax. But the reality seems to be that more and more companies are trying to downsize. And that means people will be losing their jobs. But who gets let go and who stays? How is it decided? Is it random or are the statistics? Every company or organization faces these situations. You have watched as the pushy jerk, sexual harasser, and overall buttheads seem to keep their jobs. WHY? The reality is, the people who are seen as the strongest, most dominant, most successful, greatest assets, are the ones the company needs to keep. The 'nice-guys' and the 'nice-girls' are pushed aside, pushed around, ignored, and put down most often. And these are the people who most times are the people who are let go from the company first. I have trained organization where the 'nic...