What is Marxism or what do you understand by Marxist ideology?

Related questions

• Is China doing anything at all to keep North Korea's maniacal dictator at bay?
• What does Vladimir Putin think of Trump?
• Will China eventually seek to invest in independent Caribbean islands like Jamaica, Haiti, or Cuba?
• Why doesn't the socialist parties in various nations get much attention?
• How can we bring a real and positive change in the world politics?