In my own words, what is the prerequisite for the country not to perish?

Personally, I think that the innate condition of being born in worry and dying in happiness and the country not dying depends on whether the people are United and people-oriented. Only when the people are harmonious and care for each other can this society progress and develop, and the comprehensive level of the country will go up. When the national interests are damaged, the people will despair. In today's society, I can't understand this expression, so I personally understand this sentence now. Putting aside personal interests, safeguarding the country, sacrificing yourself when the country needs it, living for this society and not living for yourself are truly bloody people.