While reading a book on self-discipline, I found an interesting sentence.
The ability to practice self-discipline is the real reason why some people are more successful and happy than others.
I thought happy should be changed to happier. Then I was thinkging about another situation: what if I use more than 2 comparative forms in a sentence.
....why some people are more successful, happier, and more balanced than others.
In this case, can I just write ....more successful, happy, and balanced..?
Thanks in advance.