At home he began to read the Social Democratic press, examine the speeches of its leaders, study its organization, reflect on its psychology and political techniques and ponder the results. He came to three conclusions which explained to him the success of the Social Democrats: They knew how to create a mass movement, without which any political party was useless; they had learned the art of propaganda among the masses; and, finally, they knew the value of using what he calls “spiritual and physical terror.”