William Henry Moore (October 19, 1872 – August 16, 1960) was a Canadian lawyer, author and Member of the House of Commons of Canada.

[4] In 1913, Moore built a large stone house on the east side of the mouth of the Rouge River in what is now Toronto, Ontario.

In his diary entry of Saturday, October 26, 1929, then Prime Minister William Lyon Mackenzie King wrote that he was "much impressed with [Moore's] knowledge of the tariff situation, etc."

Big and tall, a friendly giant, a thick trunk, sitting solidly in his chair, his legs stretched out, his arms on the armrests.

His face remains impassive, he leads his listeners a little at a time, with long pauses for their benefit, handling interruptions peacefully.

Then, he quietly calls members back to order, gives his opinion, allows others a chance to counter him, assuring all a common measure of justice.

After a long session, he rises from his chair, his back hunched, with a tired demeanour, and retreats to the library to escape the petty quarrels.

...In 1918, when World War I was still raging and in the aftermath of Regulation 17, which abolished French-language education in Ontario, Moore wrote a remarkable book entitled The Clash: A Study in Nationalities.

"[9] Senator Léon Mercier Gouin described The Clash as an "unsurpassed study of my people"[10] and endorsed Moore's definition of nationality: 1.

Moore was the author of numerous books on culture and economics including: The Mackenzie I Knew, Saturday Night, 28 December 1923