These principles already bring us to the threshold of socialism, and now Feuerbach's peculiar ethical principle carries us into its courts. That principle has been well termed Tuism, to distinguish it from Egoism. The human unit is not the individual, but man in converse with man, the sensual Ego with the sensual Tu. The isolated man is incomplete, both as a moral and as a thinking being. "The nature of man is contained only in the community, in the unity of man with man. Isolation is finitude and limitation, community is freedom and infinity. Man by himself is but man; man with man, the unity of I and Thou, is God." Feuerbach personally never became a communist, for he says his principle was neither egoism nor communism, but the combination of both. They were equally true, for they were inseparable, and to condemn self-love would be, he declared, to condemn love to others at the same time, for love to others was nothing but a recognition that their self-love was justifiable. But it is easy to perceive the natural tendency of the teaching that the social man was the true human unit and essence, and was to the individual as a God. With most of his disciples Humanism meant making the individual disappear in the community, making egoism disappear in love, and making private property disappear in collective. Hess flatly declared that "the species was the end, and the individuals were only means." Ruge disputed this doctrine, and contended that the empirical individual was the true human unit and the true end; but even he said that socialism was the humanism of common life. Grün passes into socialism by simply applying to property Feuerbach's method of dealing with theology and monarchy. He argues that if the true essence of man is the social man, then, just as theology is anthropology, so is anthropology socialism, for property is at present entirely alienated, externalized from the social man. There is a false transcendency in it, like that of divinity and monarchy. "Deal, therefore," he says, "with the practical God, money, as Feuerbach dealt with the theoretical"; humanize it. Make property an inalienable possession of manhood, of every man as man. For property is a necessary material for his social activity, and therefore ought to belong as inalienably and essentially to him as everything which he otherwise possesses of means or materials for his activity in life; as inalienably, for example, as his body or his personal acquirements. If man is the social man, some social possession is then necessary to his manhood, and might be called an essential part of it; but existing property is something outside, as separate from him as heaven or the sovereign power. Grün accordingly says that Feuerbach's "Essence of Christianity" supplies the theoretical basis for Proudhon's social system, because the latter only applies to practical life the principles which the former applied to religion and