Only when there is a surplus can new things be created. Surplus means having more than what is necessary. Creating something new requires an initial investment in advance. Whether it’s labor or capital—that is, whether labor is purchased with capital—energy can only be used for new work if there is a surplus. Only with prior investment can something entirely new, never seen before, be made. The existence of something that did not exist before in this world results from someone putting in their surplus first. - Joseph’s “just my thoughts”
Even though a country's total population is decreasing, the economic situation could be improved by increasing the total economic activity of the remaining population after the decrease. Of course, there is a statistical population threshold below which this effect occurs. Nevertheless, this effect would not work in the case of a force majeure, such as a natural disaster or the outbreak of war, however, this assumption would be valid because a rapid population decline is a highly exceptional event that would not normally occur. Therefore, an increase in the economic activity of this population should be required during an economic recession. Applying this perspective, for building a solid relationship with your followers on Instagram, the number of followers is less important than the activity between them and you. This is called the "Engagement Rate (ER)". - Joseph’s “just my thoughts”