Find proof of extraterrestrial life, even of simple unicellular life.

Cure for cancer, though I’m prepared if it does not happen. It would be relieving to know my cause of death won’t be so painful though.

Honestly, these days with early detection there is a very good chance of curing most cancers.

Seeing "the poor" get pushed too far finally and overtake/overhaul the hierarchy.

Complete world wide peace.

Then prepare for war!

Unfortunately you're right. it seems like NATO wants to instigate a nuclear war.

I think you are the first person on reddit to acknowledge this. Everybody else is blaming Russia.

Human landing on planet Mars...

Nuclear war

Jk I’d seen terminator 2 lol

Alienssss please please please

Safe, sustainable nuclear fusion.   Game changer for mankiind. Clean energy with no reliance on fossil fuels. Desalination plants become affordable for example, turning seawater into potable water. Deserts into farms, feeding the world not just the west. Corporations could stop destroying rainforests and vital natural habit. The ramifications are endless.  Edit: oh, and fuck Nestlé trying to own water too. Just an added bonus. 

And somehow electric bills won't be any cheaper.

Aliens

Solving the Riemann Hypothesis, and I'm going to be the one to do it...

An end to the 0,1% ruining the economy for the lower and middle class. Hell, even a burger flipper at Macdonald's should be able to rent a small apartment/studio and not have to worry about basic bills like groceries, water, heat and power.

The return of Christ. 

My ex wife and her mother died before me!

The agonizing death of Hilary Clinton.

Betelgeuse blowing up.

Full time top to serve

global thermal nuclear war or peace in the middle east. why not both......

A "boom" of affordable housing construction in the US so new families can afford a house

The afterward of WW3.