Few things are as difficult to categorize as cooking. What else can be called a skill, an art form, a science, and a survival tool at the same time? It's an activity that brings people together over the dinner table, but the act of cooking can also be a very private experience. It's a human adaptation, a clever trick that evolution gradually baked into our brains to conjure up more calories out of raw food to power the large brains that could, with any luck, come up with more clever tricks. It's something so fundamental that everyone knows how to do it to some degree, but only a few can master the practice after years of training. It's a life skill that can save you money, improve your mental and physical health, and attract the envy of your peers all at once. Here's why.

Cooking can save you money

When we look at the physiological changes that occurred to our ancestors, such as changes in their molar and body sizes, it seems as though human beings began cooking food about 1.9 million years ago. That's quite a long and storied history just for us to heat up Cup Noodles for every third meal.

Aside from not letting the cumulative knowledge of our ancestors go to waste, one of the major reasons to learn to cook is financial. According to a Pricenomics study, ordering delivery costs an average of $20.37. In comparison, making a home-cooked meal costs just $4.31. That's more than five times as expensive.

Despite this common knowledge, however, Americans still spend a significant chunk of change on food prepared outside the home. In 2017, Americans spent $3,365 a year on food prepared away from home. When you consider that only 39% of Americans have $1,000 or more in savings, this in and of itself is a pretty compelling reason to start cooking more. Of course, not everybody needs to worry about their finances. Some people have the money to spend, but there are still plenty of reasons to learn to cook aside from the financial one.

Eating out puts your health in jeopardy

It's no secret that cooking at home is healthier than eating out. Those delicious, professionally prepared meals really only taste so good because they're loaded with butter and salt.

One study examining chain restaurants in Philadelphia found that the average meal (defined as an entrée, side dish, and a small appetizer) contained nearly 1,500 calories. What's more, these meals contained 28 grams of saturated fat and 3,512 milligrams of sodium. Adults are only meant to consume at most 13 grams of saturated fat per day and 2,300 milligrams of sodium per day. Not only does eating out offer sub-par nutrition, but it also doubles your chances of catching a food-borne illness.

Meanwhile, a systematic review of 28 research studies found that adults who cooked at home had more energy, consumed less sodium, ate more fruits and vegetables, and consumed more fiber. As you might expect, improving your diet in this way is good for your health. Research has shown that close to half of all cardiometabolic deaths (e.g., heart disease, diabetes) are attributable to poor diets, and 20% of all deaths worldwide are linked to poor diets, which even beats smoking as a mortality risk.

Cooking's many psychosocial benefits

Cooking is both a biological necessity and a behavioral script that's been hardwired into our brains over the course of nearly two million years. As an example, a systematic review of the impact of cooking interventions on mental health found a number of positive outcomes. Study participants who engaged in baking sessions developed better self-esteem as a result of their improved concentration, coordination, and confidence. The participants also reported that one of the most satisfying aspects of the baking process was being able to produce a product that they could give away to others. The other studies in the review showed similar results; cooking raised self-esteem.

Cooking also improved positive affect — a term psychologists use to refer to the experience of emotion — and reduced negative affect. In addition, the review found that cooking improved overall well-being and health-related quality of life, primarily due to the nutritional benefits that cooking provides. Good nutrition and mental health are intimately related, so this finding should come as no surprise.