Colonisation is OVER

European countries have colonised and used Africa's land and people for some time, from the Portuguese to the British, and yet we've stopped trying to "take over" African countries.  Contemporary times seem to be focused on reparations or dealing with the consequences of colonisation, instead of continued use and exploitation of the land.  Why?  Is the land that shitty that agriculture won't continue to thrive?  Are the people that lazy that they can't force everyone to work towards industrialising civilization? 

Also, how can we terraform dry and arid land into fertile soil in order to grow crops?  This applies to Africa, the middle east, and parts of asia.  There is so much unused land, so why can't it be infused with nutrients, fertilizer, nitrates, etc.

Why would anyone want to have anything to do with Africa? It's just a sack full of problems.

If I was European, I'd invest my cash somewhere more profitable, like Asia or at home (particularly those former-communist countries). They have educated populations, (relatively) stable governments, infrastructure, and a little spare cash too.

Africa? You might as well wipe your ass with your investments, for all the good it'll do.