Pluto was last in the sign of Aries between the years of 1823 and 1852. Pluto takes about 248 years to make a full transit of the Astrological signs. Its time to pass through the signs can vary from between 12 and 32 years as it has an unusual orbit. It is considered a transpersonal planet and as such the interpretation of its movement through the signs applies to a whole generation of people and not specifically an individual. Looking at the house position that your Pluto is in will give you more detailed information on how it applies to you. The generation with Pluto in Aries possesses the ability to overturn traditional society laws and structures and start anew. In Europe during this period there were a number of Revolutionary movements. In the United States the adventurous spirit of the sign of Aries was seen in the Pioneers who traversed the country, starting anew and battling great hardship to colonise the West.