When do livings acquire the ability to think?

[scilover89]

If I am not wrong, the most primitive life is in molecular form. Somehow, they acquire the ability to duplicate themselves, and get better and better through evolution.
But, how, and when do livings acquire the ability to think?(In other words, acquire a brain)

 

[iansmith]

Nervous cell have started to evolved as early as in the Medusa but it is mostly for sensory reason rather than any complex behavior.

The simplest central nervous system started to appear in worms. The brain is involved in some complex behavior; however, the brain is not required for most of the daily activities.

Most complex brain appeared in insects and it has allowed insect to have complex social behaviors. The brain of invertebrates and vertabrates are quite distinct as they do not have the same evolutionnary path. Insect brain appeared before the vertebrate brain. So we may assume that insect were probably the first to have a thinking brain.

We should also try to define what is thinking.

 

[ravenprp]

The acquisition of the ability to think, or the development of a brain, is a complex and ongoing process in the evolution of living beings. It is believed that the earliest forms of life, such as single-celled organisms, did not possess the ability to think. Rather, their behavior and survival instincts were driven by basic chemical and biological processes.

As life forms evolved and became more complex, the development of a nervous system and eventually a brain allowed for more advanced cognitive abilities. This process is thought to have occurred over millions of years, with different species developing different levels of cognitive function.

It is difficult to pinpoint an exact moment or time when living beings acquired the ability to think, as it is a gradual and ongoing process. However, it is generally accepted that the development of a brain and the ability to think is closely linked to the process of evolution, as species adapted to their environments and developed new ways of survival.

In summary, the acquisition of the ability to think is a result of the ongoing process of evolution, and is closely tied to the development of a brain in living beings. While the exact timing may be difficult to determine, it is clear that this ability has played a crucial role in the advancement of life on Earth.