Hi, are you also a only child?
I am not an only child. I have one sibling. Being an only child is relatively uncommon.
I agree.My family is small.
Small families are very common now. After World War II, family size shrank considerably. 
That is because of the cost of life in the USA
That's correct. The Great Depression followed by WWII had a huge impact on family size.
and don't forget, more women started getting in the work force
to the country.
From 1979 to 2015, the one-child policy in the People's Republic of China restricted most parents to having only one child, although it was subject to local relaxations and individual circumstances (for instance when twins were conceived).
Families may have an only child for a variety of reasons, including: personal preference, family planning, financial and emotional or physical health issues, desire to travel, stress in the family, educational advantages, late marriage, stability, focus, time constraints
who can possibly save someone's life and I am able to do it at relatively little cost to myself but fail to do so, I have no way of justifying my behaviour to others. If I am one among millions who can save the life of a Bengali orphan by giving to charity, then I only have a limited obligation to that child compatible with others having a similar obligation. That is, I need not reduce myself to the level of marginal utility to help that child: all I need to do is