I was pretty much raised as an only child - how about you?
i have 1 sister. Throughout history, only children were relatively uncommon, so people would more commonly have more than 1 child
Well my parents had two children, but then they got divorced and I lived with my dad and my sister with my mom.
oh that must have been very hard, but there is a lot to benefit from being a single child im guessing,
Yes, to some extent - but now as adults, my sister and I really aren't that close so there are also bad things as well.  We decided to have more than one child so they wouldn't be alone.
 From around the middle of the 20th century, birth rates and average family sizes fell sharply, wich may be a fact in why there is so many single childs 
I guess once birth control became more readily available and farms no longer were family affairs, people just didn't have as many kids
Birth control
Birth control, also known as contraception and fertility control, is a method or device used to prevent pregnancy. Birth control has been used since ancient times, but effective and safe methods of birth control only became available in the 20th century. Planning, making available, and using birth control is called family planning. Some cultures limit or discourage access to birth control because they consider it to be morally, religiously, or politically undesirable.
The most effective methods of birth control are sterilization by means of vasectomy
came to-day to ask me to give her a little milk for her only child, who was dying for the want of proper nourishment. It went to my heart to refuse her; but at this time I had only just enough for my own children, and baby could not have lived without it. I think she understood that I would have given her some if I could. (14 August)brThe children still kept pretty well, though baby grew thinner every day; nothing I gave him seemed to nourish him.