This takes place throughout all history. From Abel's blood that cried to the God of heaven to the last battle of Armageddon, human history is written in blood. The third horse is black. Also in this connection the Bible speaks on the meaning of this color. Our skin is black like an oven because of the terrible famine.
Blackness speaks of famine, of so great scarcity that one is in anguish.
This black horse represents the power of economic and social strife associated with poverty and riches. Here we see scarcity, a meager existence by which one has not enough to live, but too much to die. What an accurate description of history this really is. There has been constant striving between the haves and the have nots. Labor unions with strikes and boycotts, public riots have their deep roots in the distribution of wealth.