Rob Rhinehart, a 24-year-old software engineer, just got tired of eating. Cooking was taking him a really long time, so he got inspired to make a nutrient sludge so that he just doesn't need to cook or eat again.
He is also of the opinion that a complete healthy meal is quite impossible as we would be compromising on atleast one vital ingredient for the other. For instance, there are some disadvantages to consuming only protein or only fruit diet; the latter may have excess sugar. Some foods do not enable the required amount of protein. Some foods will be high on carbs. And worse, all this could be costly too.
Not to forget, that preparing food is a time consuming job. So keeping all his on mind, Rhinehart targeted on making a nutrient sludge which ahs the right amounts of vital nutrients. He named it Soylent.