I think either is correct. The first one needs the word "to". It should be "Should I start to believe in humanity."

A Tuner

I called a tuner to the house.

While he was tuning the piano, I twisted some silk fibers into threads near a window in the same room.

He struck a chord on the piano while turning carefully a spanner connected to a tuning pin.

Using my finger tips I checked the condition of the twist of the silk thread which was tight between a nail and my teeth.
I struck the thread to make its twist be even.

He may have been able to hear the sound of the silk thread.
He may have been able to tell the name of the note.

It would take reading at least a book on each country's history to gain some understanding. Basically, we Americans fought our War of Independence (1775-1783) to gain our freedom from England. For Canadians it was a more gradual process. The two countries and peoples are the friendliest toward each other of perhaps any two in the world, I think, although we certainly have differences of opinion on many subjects. Canadians I have spoken to told me that following 911 stores sold out of American flags because everyone wanted to fly in front of their house in support of us.