Note: I don’t assume these numbers are correct, but Wikipedia provides sources.

World War I

According to https://en.wikipedia.org/wiki/World_War_I_casualties, accessed November 11, 2019:

For all affected countries (globally)
Population: 970.5 million
Military Deaths: 8,573,054 to to 10,824,236
Civilian Deaths from Military Action/Crimes: 2,250,099
Civilian Deaths Due to Malnutrition/Disease: 7,411,000 to 8,100,000
Total Deaths: 17,486,153 to 21,174,335
Deaths as % of Population: 1.8% to 2.18%
Military Wounded: 22,101,100 to 23,665,873

The details for each country are listed in the article.

For Canada
Total Population: 7.2 million
Military Deaths: 56,639 to 64,996
Civilian Deaths: 1,963
Total Deaths: 58,639 to to 66,996
Deaths as % of Population: 0.81% to 0.93%
Military Wounded: 149,732

Countries with Highest Death Counts:

1. Russia: 2,840,000 to 3,394,369
2. Ottoman Empire: 2,825,000 to 3,271,844
3. Germany: 2,198,420 to 2,800,720
4. Persia: 2,000,000 (famine)
5. Austria-Hungary: 1,787,000 to 2,081,200
6. France: 1,697,000 to 1,737,800
7. Italy: 1,052,400 to 1,243,400
8. Serbia: 750,000 to 1,250,000
9. United Kingdom: 867,829 to 1,011,687
10. etc.

World War II

According to https://en.wikipedia.org/wiki/World_War_II_casualties, accessed November 11, 2019:

For all affected countries (globally)
Total Population: 2,300,000,000
Total Military Deaths: 21,000,000 to 25,500,000
Civilian Deaths from Military Action/Crimes: 29,000,000 to 30,500,000
Civilian Deaths Due to Malnutrition/Disease: 19,000,000 to 28,000,000
Total Deaths: 70,000,000 to 85,000,000
Deaths as % of 1939 Population: 3.0% to 3.7%
Military Wounded: 22,101,100 to 23,665,873

The article lists the details for each country.

For Canada
Total Population 1939: 11,267,000
Total Military Deaths: 42,000
Civilian Deaths: 1,600
Total Deaths: 43,600
Deaths as % of Population: 0.38%
Military Wounded: 53,174

Countries with Highest Death Counts:

1. Soviet Union: 20,000,000 to 27,000,000
2. China: 15,000,000 to 20,000,000
3. Germany: 6,900,000 to 7,400,000
4. Poland: 5,900,000 to 6,000,000
5. Dutch East Indies: 3,000,000 to 4,000,000
6. Japan: 2,500,000 to 3,100,000
7. India: 2,200,000 to 3,087,000
8. Yugoslavia: 1,027,000 to 1,700,000
9. French Indochina: 1,000,000 to 2,200,000
10. France: 600,000
11. Philippines: 557,000
12. Greece: 507,000 to 807,000
13. Romania: 500,000
14. Korea: 483,000 to 533,000
15. United Kingdom: 450,900
16. Hungary: 464,000
17. United States: 419,400
18. etc.

Combining the global totals for both world wars, the death count ranges from about 87 million to 106 million.

Related:
http://ww1.canada.com/battlefront/exact-number-of-canadian-casualties-in-first-world-war-still-not-certain
Summary of Wars After Brave New World novel: https://canadianliberty.com/power-reality-journal-issue-3/
White Poppy: https://canadianliberty.com/november-11-2008-canadian-liberty-notes/
Posts on War: https://canadianliberty.com/war/