Historical Issues!!! Those who understand help me, and don t call me stupid1

Human evolution is due to the fact that the previous trees were cut down, and the apes could no longer continue to live in the trees, so they went to the path of man.

Which book is about.

Not necessarily, because you say "before human evolution", then excuse me: who cut down the trees? Taking a step back, even if a tree is cut down, apes don't evolve because the tree is cut down.

The "trees being cut down" you mentioned belong to the destruction of the living environment, and I will give you an example: dinosaurs were extinct because of changes in the living environment. But it is also impossible to deny your claim, which is subject to further development by biologists.

The evolution of apes was due to the creation of the Great Rift Valley, which made the trees sparse and the apes began to evolve to adapt to the environment. The changes in humanity are very small, and your conjecture should not bear fruit until a few hundred years later, but it is very possible!

Probably not, there are humans now dominating the earth, unlike the previous evolution that relied entirely on the changes of nature to evolve species!

Human evolution is not because trees are cut down, but this is also a small aspect, mainly because organisms are the survival of the fittest. At that time, there should have been more food on the ground and less on the trees. Therefore, the ape mainly looks for food underneath, because the hand has to hold the food, so it is difficult to walk on four feet, so it slowly becomes a two-foot walk.

Our current tree cutting is not yet massively devastating. If all the trees in the world are lost one day, there is a possibility that the gene will mutate into another species.

I don't dare to guarantee accuracy, throw bricks and lead jade, and set off the safflower.

1. The tribal system of primitive society.

2. The specific political system of the society is feudal, starting from the Xia Dynasty, and the hereditary system after the Chan Dynasty.

3, Xia Wei. 4. It is not a historical retrogression, but an inevitable requirement for the development of productive forces.

1) In the slave society, some production requiring large-scale labor such as bronze tools gradually emerged, and it was necessary to establish a new political system and ruling system suitable for collective cooperation to coordinate social production.

2) Due to the low productivity, it is impossible to organize production in a socially distributed way of fair distribution, so there must be a mode of production that exploits the surplus value of slaves.

It's simpler.

There is no absolute conclusion on this issue, but it is now available to the public.

1 is the primitive system, Yan, Huang, Yao, Shun and other eras!

2 slavery, 2 reflects the essence of "the formation of a slave society when the material ** is not sufficient."

In the Xia Dynasty, Xia Qi, the son of Xia Yu, began the slavery system.

Hereditary system, Xia Yu's son Xia Qi inherited his father's monarchy and officially changed Chan to hereditary.

3 Xia Wei, the monarch was brutal, the princes were centrifuged, and the dissatisfaction of all classes led to the fall of the Xia Dynasty.

4 In the later period of primitive society, marked by the emergence of metal tools, there was a new development of productive forces, and the individual labor with the individual family as the unit gradually replaced the common labor with the clan as the unit, and the means of production were gradually privately owned by the individual family, and private ownership was born.

After entering the slave society, the development of the productive forces was manifested in the widespread use of metal tools; There have been further developments in agriculture and animal husbandry; the rise of handicrafts; The prosperity of commerce and cities, the formation of classes and the division of labor, is conducive to the development of productive forces.

The fundamental reason is that the establishment of the slavery system adapted to and promoted the development of the productive forces at that time, which is mainly manifested in the following aspects: (1) the widespread use of metal tools; (2) agriculture and animal husbandry have developed significantly; (3) the rise of handicrafts; (4) Prosperity of commerce and the city.

Chang'e-1 is a lunar exploration satellite that was successfully launched at 18:05 on October 24, 2007.

Shenzhou-1 was launched at 6 a.m. on November 20, 1999 at Jiuquan Cosmodrome, and Shenzhou-6 was launched at 9:00 a.m. on October 12, 2005 at Jiuquan Satellite Launch Center, with two astronauts, Fei Junlong and Nie Haisheng.

Shenzhou 7 September 25, 2008 21:10:04, personnel Zhai Zhigang (commander), Liu Boming and Jing Haipeng.