“I am not an isolationist,” Sen. Rand Paul declares in a Time op-ed today outlining the who, what, when where and why of his strategy against the Islamic State. This comes after President Obama delivered a speech last week that provided no strategy update.

The Who:

Rand Paul, Barack Obama, Hillary Clinton and the Islamic State.

• “If I had been in President Obama’s shoes, I would have acted more decisively and strongly against ISIS.”

• “In Syria, Obama’s plan just one year ago—and apparently Secretary of State Hillary Clinton’s desire—was to aid rebels against Assad, despite the fact that many of these groups are al-Qaeda- and ISIS-affiliated. Until we acknowledge that arming the Islamic rebels in Syria allowed ISIS a safe haven, no amount of military might will extricate us from a flawed foreign policy.”

• “ISIS is a global threat; we should treat it accordingly and build a coalition of nations who are also threatened by the rise of the Islamic State. Important partners such as Turkey, a NATO ally, Israel, and Jordan face an immediate threat, and unchecked growth endangers Kuwait, Saudi Arabia, Gulf countries such as Qatar, and even Europe. Several potential partners—notably, the Turks, Qataris, and Saudis—have been reckless in their financial support of ISIS, which must cease immediately.”

The What:

Peace through strength — at home and abroad.

Some pundits are surprised that I support destroying the Islamic State in Iraq and Greater Syria (ISIS) militarily. They shouldn’t be. I’ve said since I began public life that I am not an isolationist, nor am I an interventionist. I look at the world, and consider war, realistically and constitutionally.

I still see war as the last resort. But I agree with Reagan’s idea that no country should mistake U.S. reluctance for war for a lack of resolve.

As Commander-in-Chief, I would not allow our enemies to kill our citizens or our ambassadors. “Peace through Strength” only works if you have and show strength.

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Our immigration system, especially the administration of student visas, requires a full-scale examination. Recently, it was estimated that as many as 6,000 possibly dangerous foreign students are unaccounted for. This is inexcusable over a decade after we were attacked on 9/11 by hijackers including one Saudi student who overstayed his student visa.

We should revoke passports from any Americans or dual citizens who are fighting with ISIS.

The When:

Weeks ago — years ago even.

• “I would have called Congress back into session—even during recess.”

• “And why, after six years, does President Obama lack a strategy to deal with threats like ISIS?”

The Where:

In the Middle East.

The military means to achieve these goals include airstrikes against ISIS targets in Iraq and Syria. Such airstrikes are the best way to suppress ISIS’s operational strength and allow allies such as the Kurds to regain a military advantage.

We should arm and aid capable and allied Kurdish fighters whose territory includes areas now under siege by the ISIS.

Since Syrian jihadists are also a threat to Israel, we should help reinforce Israel’s Iron Dome protection against missiles.

The Why:

Islamist Jihadists and national interest.

To develop a realistic strategy, we need to understand why the threat of ISIS exists. Jihadist Islam is festering in the region. But in order for it to grow, prosper, and conquer, it needs chaos.

Three years after President Obama waged war in Libya without Congressional approval, Libya is a sanctuary and safe haven for training and arms for terrorists from Northern Africa to Syria. Our deserted Embassy in Tripoli is controlled by militants. Jihadists today swim in our embassy pool.

Syria, likewise, has become a jihadist wonderland.

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Once we have decided that we have an enemy that requires destruction, we must have a comprehensive strategy—a realistic policy applying military power and skillful diplomacy to protect our national interests.

The immediate challenge is to define the national interest to determine the form of intervention we might pursue. I was repeatedly asked if I supported airstrikes. I do—if it makes sense as part of a larger strategy.

“And while my predisposition is to less intervention, I do support intervention when our vital interests are threatened,” Paul would add.