Fruitarianism

Fruitarians (or fructarians) eat in principle only the fruit of plants.

Some people whose diet is not 100% fruit, consider themselves fruitarian, if their diet is 75% or more fruit.

Fruitarian definition of fruit
When discussing food, the term "fruit" usually refers to just those plant fruits that are sweet and fleshy (for example, plums, apples, and oranges). Botanically, though, some foods not typically considered fruits—including bell peppers, tomatoes, cucumbers, nuts and grains—are fruits.

Fruitarians use differing definitions of what is considered a "fruit."


Definition of fruitarian
Some fruitarians will eat only what falls (or would fall) naturally from a plant, that is: foods that can be harvested without killing the plant. These foods consist primarily of culinary fruits, nuts, and seeds. Some do not eat grains, believing it is unnatural to do so, and some fruitarians feel that it is improper for humans to eat seeds. Others believe they should eat only plants that spread seeds when the plant is eaten. Others eat seeds and some cooked foods.

Some fruitarians use the botanical definitions of fruits and consume pulses, such as many beans and peas, while others include green leafy vegetables and/or root vegetables in their diet.


Motivation
Some fruitarians believe fruitarianism was the original diet of mankind in the form of Adam and Eve based on Genesis 1:29.[8] They believe that a return to an Eden-like paradise will require simple living and a holistic approach to health and diet. Some fruitarians wish to avoid killing in all its forms, including plants.

Some fruitarians say that eating some types of fruit does the parent plant a favor and that fleshy fruit has evolved to be eaten by animals, to achieve seed dispersal.
From the Wikipedia

In his formative years in England, Ghandi was in contact with the fruitarians. In a way they must have helped him to develop his world vision.
George Bernard Shaw and the Fabians also cherished these ideas.