Nevertheless, he who displays all these qualities, still is not entirely sure of being able to improve his position, or even to maintain himself in it; crises, as has been shown, are inevitably bound up with capitalism itself, and strike at times the most substantial and energetic capitalists. By a new invention or a new manner of working the most active and intelligent manufacturer may see himself out-stripped by a competitor. And aside from all fortuitous circumstances, in society as it exists today the struggle for existence is a struggle between those best armed, those who have the best machines, etc. But the manufacturer who can procure the best machines, who can bring his establishment up to the latest technical requirements, who can procure the services of the ablest technicians, etc., is the man who has most capital. The struggle is not a struggle of men but of capital. In his work, “Die Darwinsche Theorie und der Sozialismus” Dr. L. Woltmann has brought out clearly the difference between the combat in nature and that which takes place in society. He says: “The history of the civilization of the human race also proceeds upon the basis of the great biological principles of adaptation, transmission, and perfection in the struggle for existence. But between the application of these principles among the lower animals and in the world of man there are the following essential differences. In the first place in the animal world the struggle for existence takes place through the adaptation of organic means to organic ends, while with men technical tools and economical means of production enter in, things which are not within the power of separate individuals, but are made possible by association. In the second place hereditary transmission in the case of animals is organic, while in the case of human beings there is added an external and legally determined hereditary transmission of technical tools and of capital. In the animal kingdom, in the third place, the struggle for existence is a rivalry of organic production and reproduction, while among men, especially under the capitalistic order, there takes place a competition in commodities and places, a contest for profit, which has hardly anything in common with natural selection.” [283] Thus we see clearly who it is that can rise from the class of non-possessors to that of possessors: it is those to whom fortune is peculiarly favorable, or who, possessing the qualities necessary for the capitalist, meet with the opportunity of putting them in evidence. Those who are dropped from the capitalist class are those who have been unfortunate or who do not possess the qualities necessary for capitalists.