In Majesty of Man, Rabbi Leibowitz explains that when Hillel and Rabbi Akiva emphasized loving our fellow man as ourselves, they were describing fundamental principles of the Torah. As the Ramban explains, although the trip to Egypt was long and dangerous, Yaakov felt that developing the brothers' feeling of unity and brotherhood was worth the risk. This Ahavat Yisrael (love for a fellow Jew) is so critically important that Hillel and Rabbi Akiva stressed it, and Yaakov risked his own sons' safety for it. If we neglect each other's needs in the outside world, in the workplace and at home, we're placing ourselves in danger of losing the comm"unity" we strive to be a part of!