Final answer:
Libertarians side with the left on traditional moral values and the criminal justice system due to their strong belief in individual liberty and minimal government intervention, as opposed to traditionalists or social conservatives that seek regulation aligned with moral standards.
Step-by-step explanation:
Libertarians are often found siding with the left on matters of traditional moral values and criminal justice because they champion individual liberty and minimal governmental intervention. Unlike social conservatives or traditionalists, who favor legislation that aligns with their moral standards, libertarians believe the government should not regulate personal behaviors such as sexual privacy among consenting adults. Their stance on these issues reflects a broader ideal that government should protect individual rights and freedom without being the initiator of force. This libertarian view aligns at times with progressive-moralists and the center left, particularly on policies that maximize personal freedom.
Thus, while the libertarian philosophy generally advocates for a hands-off approach in economic matters as well, which often aligns them with conservatives, their social policies tend to align more closely with the left due to their views on personal liberty and justice system reform.