The international community could halt the proliferation of genocides by arresting them before, or at least while they are happening, by any means necessary. Instead, the focus is on actions after the fact.
W. Michael Reisman,
Legal Responses to Genocide and Other Massive Violations of Human Rights,
59 Law and Contemporary Problems
Available at: https://scholarship.law.duke.edu/lcp/vol59/iss4/7