Why is it that outside of Israel no one teaches the philosophies and teachings of the greatest Rabbi in the last thousand years-HaRav Avraham Yitzhak HaCohen Kook? I feel that this would be essential so that Jews abroad in the galut can get a truthful Jewish education and as such Aliyah would be increased. It is a such a shame that no one speaks up for this great Tzaddik and his works are not studied in north american yeshivas.

I'm not sure your assumptions are completely correct; similarly it's not our job to grade rabbis of the last thousand years; however - you are right that Rav Kooks' teachings should be learnt more and implemented more in Israel and out side of Israel.