aka winning the birth lottery. Who your parents are, how many resources can they expend on you, who do they know that can introduce you to other resources. The birth lottery has the biggest effect on your outcomes in life.
Calling it a birth lottery implies that it's unfair. It's not a lottery, it's your family that set you up.
This is why I like the way things are here in Norway. Sure it's still a huge advantage to be born into a wealthy family or just a good one, but at least no matter who you are you can get an education and healthcare, dental etc.
I don't mind paying a bit more taxes for that.