Tomorrow is the big day: The History of Jihad From Muhammad to ISIS will be available in bookstores, and Amazon and Barnes & Noble will begin shipping the book to those who have already ordered it.

The history of jihad needs to be more widely known. If it were, many of the policy errors of the last twenty years could have been avoided. Some of the things we have done wrong since 9/11, because policymakers did not know the history of jihad or why it mattered:

1. Trying to establish democracy in Afghanistan instead of a making a more narrowly focused move to get bin Laden and destroy al-Qaeda;

2. Removing Saddam Hussein, who was doubtless a brutal tyrant, but who was not a jihadi and was not involved in the 9/11 plot (at high levels, officials of Saudi Arabia and Iran were) — his removal ultimately led to the rise of ISIS;

3. Supporting the “Arab Spring” movements and removing Qaddafi in Libya, giving an opening to jihad groups there;

4. The Iran nuclear deal, enabling Iran to increase its support for jihad terror groups.

The book also shows indirectly, by the sheer force of history, what Trump is doing right:

1. Taking immigration and border security seriously;

2. Pummeling ISIS — beating the enemy, not “winning hearts and minds”;

3. Supporting Israel strongly and unapologetically, without pressing it to make concessions that will not end, but will only embolden, the jihad;

4. Cancelling the Iran deal.

Have you ordered yours yet? Click here to order The History of Jihad From Muhammad to ISIS.