Liberalism is the belief in a large and powerful centralized government. This does not mean that every liberal is a communist, but it also doesn't mean any thing about "looking after the oppressed" like so many seem to think it is.
As far as modern liberalism goes, they usually support issuses such as abortion, socialized health care, and the anit-war movement.
Many of todays liberals are composed of college age and younger teens who tend to be more ideological(i.e war is bad in all cases.)
Liberals:Al Gore, John Kerry, and that sister that went to collage and then came back screeching about the plight of wemon in this country