There are more laws and international treaties designed to protect human rights in conflict zones than ever before. Yet civilians continue to pay the ultimate price, with women and children frequently caught in the crossfire. At the beginning of the 20th century, there was one civilian casualty for every eight or nine military casualties, said Richard Goldstone, the South African jurist who played a key role in helping his country overcome apartheid, served as the chief prosecutor of the International Criminal Tribunals on Rwanda and the former Yugoslavia, and became a household name in 2009 for his controversial fact-finding mission after an Israeli offensive in the Gaza Strip. During World War II, the ratio increased to 1-to-1. Today, after what was, Goldstone said, a "very bloody century," every combatant casualty is matched by nine civilian deaths.

What explains this? Goldstone joined Stanford historian James Campbell and Peter Berkowitz, a political scientist, to grapple with this paradox as part of Stanford's Ethics and War Series, co-sponsored by the Center for International Security and Cooperation.

One reason behind this seeming disconnect is that gaping anomalies remain in the international legal system. It is a "very recent development that international laws have been designed to protect civilians and civilian objects," said Goldstone. Another cause of the paradox is that the most critical issue in determining whether the death of a civilian constitutes a war crime is highly subjective. The so-called principle of proportionality, defined by the Law of Armed Conflict, requires that parties refrain from attacks resulting in excessive civilian casualties. But it is up to "reasonable commanders" to judge whether such violence is justified, said Berkowitz, a senior fellow at the Hoover Institution.

Compounding the problem is that in many of the nations where crimes against civilians may have been committed, there is little interest or even open hostility toward allowing international fact-finding missions to make an assessment. Moreover, many of the transnational organizations designed to help protect civilians simply fail to do so. Goldstone said the UN should be commended for assisting the injured in Gaza but "stands condemned for ignoring the plight of Tamils."

A better system might include requiring greater education in military affairs for human rights lawyers, Berkowitz said. Goldstone's report on the Gaza conflict, Berkowitz argued, failed to properly evaluate whether the civilian cost was a military necessity, noting that Goldstone did not assess whether "reasonable" Israeli commanders had intended to avoid civilian casualties. A better understanding of military procedure, Berkowitz suggested, might have helped Goldstone and others in a similar situation make that kind of assessment.

The United States may also have a role to play in filling in the gaps in the international justice system. Campbell said that the Geneva Convention of 1949, which extended legal protection to war victims, was largely an American construction. Indeed, Berkowitz said that America has "special burdens" to spread liberal democracy across the world. However, the U.S. was reluctant to sign the Convention on the Rights of the Child, ratified by 194 U.N. nations that would protect women and children, said Helen Stacy, a senior fellow at the Center for Democracy, Development, and the Rule of Law.

How some of these issues will be resolved is still an open question. Human rights laws are complex and evolving, said Campbell. "Just as freedom is a constant struggle, so is international humanitarian law," he said. The important part was that the legal system continues to grapple with these issues. The struggle toward an effective system of international justice is being "waged in our country," he said, "in dialogues like the ones we are having today."