I just finished a five-month leave from this column, writing a book with my wife, Sheryl WuDunn, and what struck me while away from the daily fray is a paradox that doesn’t seem quite patriotic enough for July Fourth.

But I’ll share it anyway: On security issues, we Americans need a rebalancing. We appear willing to bear any burden, pay any price, to confound the kind of terrorists who shout “Allahu akbar” (“God is great”) and plant bombs, while unwilling to take the slightest step to curb a different kind of terrorism — mundane gun violence in classrooms, cinemas and inner cities that claims 1,200 times as many American lives.

When I began my book leave, it seemed likely that the massacre at Sandy Hook Elementary School in Connecticut would impel Congress to approve universal background checks for gun purchases. It looked as if we might follow Australia, which responded to a 1996 gun massacre by imposing restrictions that have resulted in not a single mass shooting there since.

Alas, I was naïve. Despite 91 percent support from voters polled in late March and early April, Congress rejected background checks. Political momentum to reduce gun killings has now faded — until the next such slaughter.