How many people does it take to rebuild industrial civilization on another planet?

First of all, it's not a question of how many people are needed, that is, we use our imagination to find a place suitable for our human beings to live in, and we can reach it, and it's still safe without other higher life, so that we humans can transform other planets, shoot people, shoot technology and shoot machines.

The premise of all this is that we can reach another planet quickly and eliminate all interference. We will begin to build a civilization. First of all, we need people in that civilization, and these people want to build an industrial civilization, which means that there will be people living there in the future, so we need people from at least one country.

We don't need a country just to build people who need it. Relying on our manpower for building cities now, we need one million people. The premise is to rebuild civilization in an all-round way on this alien planet. After we have established civilization, we will survive, and we cannot directly waste a planet. At that time, we will need tens of millions of people.

Leaving the earth or even the solar system to colonize outer space has been a dream of mankind in recent decades. Astronauts on the International Space Station can overlook the earth, but astronauts who leave the solar system to explore need to go through the long darkness year after year. They may be the first generation who have never seen the earth. No matter who will go to that distant planet, everyone needs to be able to cope with the sacrifices and difficulties in the exploration journey. Not everyone can do it, but history tells us that some people still have this quality. ?

Mankind has an endless spirit of exploration, and there will always be some real explorers who will never give up on adversity and will not stop because of challenges. But it is not enough for explorers to emigrate to other planets. We need to send enough people there to build a brand-new civilization. ?

However, if our scientific and technological level can develop, we can find a planet suitable for the development of civilization, that is to say, at least we can only fly at the speed of light, and there are interstellar shuttles. When we go to build civilization, we may not need a large number of people. Wherever there are machines, we need a small team to look after them.