Unfortunately each point doesn't have a zIndex property. But like Bubbles mentioned, you can always add the point to the end so that it gets rendered very last and hence shows up on top.
Highcharts are made out of svg elements, which are not directly controlled by things like z-index. However, you still can control what elements are rendered ontop of what - the last element in an svg tree is drawn over the rest, so to promote an element to the front you can just pop it out, and append to the svg element containing the chart.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.