Leonardo da Vinci once said, “Simplicity is the ultimate sophistication.” This maxim holds a great deal of merit in today's life cluttered with chaos, pain and stress produced by undefined goals and purposes. Consequently, it appears that simplicity in life can bring us peace and tranquility because such lifestyle helps lower our stress providing us with a healthy life which is a prerequisite to high thinking. By changing our life into a simple lifestyle , we can create clearer goals, have a full concentration on our actions, and get more things done . In point of fact, the higher the clarity of our thoughts, the more effective our ability to perceive and solve problems. In other words, clear thinking skills can help us make smarter decisions regarding the problems inhibiting the natural progress in life. Therefore, as things stand right now, simplicity and high thinking play a pivotal and complementary role in having a healthy life in the modern chaotic world.
Although I agree with the above in theory,, a high degree of competitiveness was shown in the lives and research of those who first sequenced human DNA. And we only know about this competitiveness because they wrote about it.
I see two type of answers here, one of them addressing the simplicity of life as simplicity of lifestyle, in which simplicity follows the rule of "less is more".
And the other one, that addresses the simplicity in life choices, which entails a simplicity of decision making and of though pattern (by avoiding overthinking and over-complicating)
The first one is more related to the social, whilst the other to the personal/private.
It is not easy to measure simplicity. Because you need to re-examine the simplicity you mean more emphasis on what thing? if it is related to the environment it should also be examined on the environmental relationship with such things as the environment - human (social science), environment - machinery or tools (technology science) and supporting environments such as nature and its content (nature science). And each relationship has its own simplicity value.
La simplicidad es la respuesta al ritmo frenético de una sociedad compleja basada en estrategias de mercado que nos manipulan. La simplicidad es la solución para el bienestar de la persona, nos da sosiego, paz interior y respeto por nosotros mismos y por el entorno que nos rodea, apreciando el valor del medioambiente y la necesidad de cuidarlo.
Simplicity means away from all the lustrous and alluring desires. Gandhiji quoted this concept of simplicity as "Simple living and high thinking". It means when you keep aside all your unwanted wishes, you are most probably in the state of concentration and creation of fruitful things which in turn helps the society at large. We have seen the lives of many environmental activists like Medha Patkar, Sundarlal Bahuguna etc. who never lived luxurious life and dedicated and contributed a lot for environmental reforms. The person who lives simply can never harm his/her surroundings as he/she not have much to take from it. But in turn can repay to the society in form of protecting the natural heritage.