The wrong thoughts we mist have about the instability of the economy is in thinking that poor economy growth is as a result of over population of the human and many have wrongfully thought about this by reducing the number of children they are giving birth to, i don't think the solution is in reducing the birth rate, infact we need a higher population to help boost the economy because there will be enough division of labour and work force in every aspect of production and services delivery in the economy and as we know the impact a population has towards the economy, it boost and increase it's activities and development, if the population is reduced, that does not assure a positive end results in economy activities, but adequate planning is what is needed to organize the people into a unified structure.
I may be wrong, but I don't think there's any country that has not been able to develop further because of low population. Like I said, I might be wrong. I feel like we're at that stage where we can't be truly underpopulated.
One thing people mistake for underpopulation is an uneven distribution of people in the towns and cities of countries. In most countries today people flood to the urban areas. People want to live and work in the relatively more developed cities. This makes the rural areas and less developed places to be less populated.
There are countries where over 20 million people are crowded in a small region while there are vast places occupied by only 300,000 people.
This is no fault of the residents who relocate, it's because they're in search of a better life. There are better opportunities in the bigger cities.
On a personal note, I'll take under-population over over-population.
I disagree that population collapse is a much bigger risk to civilization than global warming.
There is a higher risk of flooding these days. Farmer take out loans for their farms and the farms get destroyed by floods. What's worse is that there is a high probability that this will happen every year.
Some places don't see rain much often before, now they even see less amount of rain. So many irregularities in the weather.
If we can be able to make life better, and train people in different areas that they want to get trained in then we won't have an issue of under-population at this stage.
Why would people give birth if they think or know they can't provide for their kids?
I don't believe the labor force has reduced, but if it truly has, did it reduce due to low population or due to low-skilled workers?