That would be a misleading characterization of Ron Paul, who is pro-capital punishment, anti-abortion, anti-choice, and is weak or absent on gay rights issues. Libertarian activists generally make rhetorical noises about social justice and some liberal causes, but their focus is on shrinking the federal goverment to its status in 1796, or on taxes, regulation, and property rights. Go on CATO, and tell me which way they are weighted: towards reactionary ecnomic theory? Or towards social justice for gays, minorities, and women?
He is pro capital punishment? You want to check that?
Absent on gay rights? He is as vocal against the federal marriage bans as any.
http://www.lewrockwell.com/paul/paul207.html
And for the same reason he is against federal authority on abortion. There is no proper authroity for the federal government on the issue.