Why is the incidence of Cancer increasing?

I read the first chapter of Parks, book of Preventive and Social Medicine for the first time today,
That led me to Ponder over this :

Man was plagued by diseases (Pun intended) created by the piling of garbage, rapid industrialization and poor city planning, during the 17-19th centuries.
These diseases had micro organismic causes and soon the Germ Theory of Diseases was propounded by Robert Koch and Louis Pasteur.
The invention of microscopes soon led to the discoveries of pathogenic micro organisms in quite succession in 1940s to 1970s.

Soon, Man succeeded in developing chemotherapeutic agents that could kill these agents. Cheaper and widespread availability of drugs led to its drastic use and subsequent fall in acute infectious diseases was noted.

Man, at this point, had mingled with the mother Nature. He tried to alleviate fellow humans and increase standard of living by prolonging the expectancy of life.

The next generation which followed, had the luxuries of lesser infectious diseases but, Nature had another challenge in store for us.

Chronic non infectious, lifestyle or genetic diseases became more common. Drugs for cancer have become the Holy Grail for modern Medicine.

Some day when mankind achieves victory over these chronic diseases, age related debilitations will prove to be the limiting factor to the immortality of mankind and then we will have to search for anti aging drugs and elixirs of life.

"Nothing is immortal in the material world" will finally dawn to the homo sapiens sapiens and that's when, man WI learn to lead a simple but meaningful life.

Let's become "chaabiwallahs"

What's the difference between a "chaabiwallah" and a "doctor" ?

A chaabiwallah or a 'key maker' as you imagine him, is a shabbily dressed man sitting idly for most of the day, on a dented stool placed on the pavement besides a small cupboard containing keys, ready to be shaped into the required outline.
Sometimes no key is available and you desperately wish to open the lock, which is difficult to be broken. To your rescue comes the key maker!

Many of them succeed by trial and error method. But that also makes them powerful enough to be able to open any physical Lock!

Have you ever then fretted about the security the lock makers promised? The peaceful sleep that I used to get after locking my possessions, will never be the same after knowing this fact!

However, also think about another fact. These chaabiwallahs are capable to breaking into houses and cars, capable of making easy money in the wrong way. Yet, they choose the right path.

Now let's talk about doctors!
They have knowledge. They too, have a key (treatment) for the lock (disease). But you won't see them sitting idle, dressed pathetically. On the contrary, they ll boast of having made better fitting keys to the existing locks.
These chaabiwallahs will go to the extent of even destroying the lock in the quest of finding the best key. They sometimes do not ask the basic question "is another key required?"
Now we have companies that make keys for locks that are alike. Even a child can tell you that no two locks are made alike. Thus, buying keys from these companies claiming to make the best keys, is nothing but a business of fooling the customer.