We are standing on the most prosperous period in history, and will enter in greater prosperity. Although the economy in real life is declining and secondary disasters are surging, the current fluctuations are more like historic opportunities than the wars, famines and massacres since 1900. Prosperity is not an empty talk. The prosperity of any civilization firstly depends on the improvement of energy utilization, secondly on a wider range of capacity of exchanging material and information -- a unified currency, and a broader living space -- a multi-dimensional universe.