So only children are the future. Bigger families are increasingly disparaged in the West, remaining the preserve of the opposing ends of the class spectrum, and fewer and fewer of us will be able to afford the financial and time investment required to rear a brood as market conditions adapt to smaller families.
There are children who were raised as only children who were happy to be so, and others who were desperately miserable. Likewise, there are children raised with siblings, maybe just one or perhaps more, who absolutely loved it, and others who look back on their childhoods less enthusiastically. Only children, two children, ten children - there are advantages and disadvantages to each.