Actually most of the land (in area) is in the southern hemisphere. The map projections that we use were all invented by Europeans and Americans and so they portray the Northern hemisphere as being bigger (the Equator runs across Northern Africa). However most of the land in the southern hemisphere is inaccessible (tiny islands or little to none infrastructure), tied up in war/civil war, or useless for agriculture *Cough desert in North Africa Cough, buried under jungle or unclaimed. Basically the Southern Hemisphere is a 'hard to get things done' place.
There is one problem here though. Peter's projection truly depicts South America and Africa in a better proportion to all other land, but still 2/3 of Africa is on the northern hemisphere, and 1/10 of South America too. So it isn't possible that the northern hemisphere doesn't have more land.
This is Peter's projection, and it seems that even with Antarctica the southern hemisphere loses.


