The most important revolution in the life of mankind is the Neolithic. Why - read in this question "How did the Neolithic revolution influence the emergence of human civilization?"
Religious, namely Christian. The commandment: love your neighbor - changed the world. Christianity gave a second and more successful life to natural law. From it came both the social contract and the Protestant work ethic.
Cultural - Renaissance (Italy, XIV-XVI centuries) /
Religious - Reformation (Germany, first half of the XVI century).
Economic - Industrial revolution (England, second half of the 18th century).
Technical - steam engine (England, second half of the 18th century).
Political - American Revolution (1765-1783).
Scientific - Einstein's General Theory of Relativity (1905).
Why? These revolutions have shaped the modern world.