The schools of Shammai and Hillel for the very first time disagreed regarding a case of Jewish law. This occurred around the turn of the 1st century. In the ensuing generations, the schools argued regarding many different laws, until the law was established according to the teachings of the "House of Hillel" -- with the exception of a few instances. According to tradition, following the arrival of the Moshiach the law will follow the rulings of the House of Shammai.
All throughout, the members of the two schools maintained friendly relations with each other.
After a 12-day sea voyage, the previous Lubavitcher Rebbe, Rabbi Yosef Yitzchak Schneersohn (1880-1950), disembarked at the New York harbor on the 9th of Adar II of 1940, following his miraculous rescue from Nazi-occupied Warsaw.
Links:
Vintage film clip of the Rebbe's arrival in NY, March 19, 1940
More about Rabbi Yosef Yitzchak of Lubavitch
Afterlife is a very rational, natural consequence of the order of things.
After all, nothing is ever lost—even the body only transforms into earth. But nothing is lost.
So too, the person you are is never lost. That person—that soul—only returns to its origin.
If your soul became acutely attached to the material world during its stay here, then it must painfully rip itself away to make the journey back.
But if it was only a traveler, connected to its source all along, then its ride home is heavenly.