The accumulated deterrence achieved in the three previous rounds of wide-scale fighting between Israel and Hamas in 2008-9, 2012, and 2014 has come to a temporary halt. Israel must start preparing for a massive fourth round – a round in which Israel will, one hopes, replicate the cumulative deterrence it scored against the Arab States in 1973. This would mean subjecting Hamas to a threshold of pain sufficiently unbearable to induce it to stop fighting Israel altogether.