Israel's youth population is pushing the country decidedly to the political right. As the transition to this age cohort unfolds, the question of which Israeli nationalist party will be in charge comes to the fore. Will they be incrementally expansionist, security-minded, economically-focused types of parties like Likud? Or will they be more ideologically committed to the cause of annexing settlements types of parties like Yamina? Or will they be religiously-focused, culturally conservative, increasingly demographically muscular types of parties like the ultra-Orthodox party Shas? The predominance of one of these three types will have consequences for Israel's regional security posture, on occasion bringing it in line with some new allies in the Gulf while reaffirming enmity with Iran and Turkey....