Living in the Land of Israel

Is there a mitzvah for the Jewish people to settle the Land of Israel (Yishuv Ha'Arerz)? Is there a mitzvah for the Jewish people to "capture" the Land of Israel (Kibbush Ha'Aretz)? If so, does "capturing" mean what it sounds like, namely using military means to take possession of the land? Is there a mitzvah for individual Jews to make aliyah? If so, what kind of mitzvah is it? In this talk, Shai Held gets to the heart of the issues concerning how we conceptualize living in Israel.