As Smiling said in his edit. More people were killed in war in the last century than all the wars before PUT TOGETHER!
Millions of people live in dire poverty.
You live in the comfort of a country which affords food, water, medical care, and welfare checks. Yet disease is a massive killer even in first world countries never mind third world countries. Heart disease, thrombosis and cancer are still the biggest killers despite medical care.
You really have your sums wrong. Things are not better at all. News reports all over the world is all about corruption, death, crime, disease, terrorism and war.
In the past poverty was not on the global scales as we see everyday. Famine is a great threat not only to poor nations but food shortages and price rises are affecting even rich nations. The poor countries are in unpayable debt.
This planet is totally mismanaged and butchered for $$$$. This world is run badly and totally sucks. Hardly anything is good on the news anymore.
We are nowhere near curing most diseases. We can hardly cure any disease. Some people survive with medical treatment but most die eventually or delays death.
The biggest diseases are still killing the most people despite medical advances.
Most people cannot afford medical treatment anyway, and live in a country where their government can't pay it.
You seem clueless to the state of this planet. I wish I had your ignorance it would make me sleep better at night.