No. Originally we sketched out 9 hallmarks of aging, and it has since increased to twelve. We don’t have a full picture of immortality yet, let alone conquering it.
Most deaths seem to be cardiovascular, heart disease, stroke, then followed by cancer.
Oh, that's just derived from old theology.
Genesis 6:3, 'Then the LORD said, “My Spirit will not contend with humans forever, for they are mortal; their days will be a hundred and twenty years.”'
This kinda got spread throughout the zeitgeist long ago as a "maximal lifespan", but the reality is that only 3 in 10,000 even make it to 100. There's no hard cutoff, but functionally essentially no one gets to 110.
Scientifically, there's no hard reason we couldn't increase our lifespans indefinitely, but we've got a lot of work to do before we'll be able to get a reasonable number of people up to 125.