Looking on the internet deeply has found these results:

improve human life is the most popular phrase on the web.

improve human lives 119,700 results on the web	improve human life 183,400 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
It doesn't look like this phrase is very popular! The search could not find any examples on the internet.	I think the take Whereas they should also aim to restore, preserve and improve the quality of human life; Whatever research is envisaged, it is obvious that the objective is to improve human health and quality of life. I believed that we were making androids that would help improve human life. home message though is that we can improve the real quality of human life by reducing the differences in incomes between us. It eventually aims to help improve human health. Human life cannot be subject to voting. In addition, the sacrifice of human life in order to improve the quality of other lives, evokes feelings of cannibalism.

improve human lives

119,700 results on the web

improve human life

183,400 results on the web

More popular!

It doesn't look like this phrase is very popular! The search could not find any examples on the internet.

I think the take
Whereas they should also aim to restore, preserve and improve the quality of human life;
Whatever research is envisaged, it is obvious that the objective is to improve human health and quality of life.
I believed that we were making androids that would help improve human life.
home message though is that we can improve the real quality of human life by reducing the differences in incomes between us.
It eventually aims to help improve human health.
Human life cannot be subject to voting.
In addition, the sacrifice of human life in order to improve the quality of other lives, evokes feelings of cannibalism.