He stated that religion was the 'opiate of the people' or 'opiate of the masses'.
He believed it was a tool usedby the ruling class in order to control the masses.
He also believed its existence owed to the fact that we naturally want answers to questions we don't yet know the answer to "religion is the impotence of the human mind to deal with occurrences it cannot understand."
He believed it was necessary to rid our society of religion before we could be happy: "The first requisite for the happiness of the people is the abolition of religion."
Karl Marx is the founder (and so naturally is a believer of) modern socialism and communism.
He was an extremely academic economist.
One of his strongest beliefs was that the world has a limited amount of resources and a certain amount of people. Logic states that the right thing to do is to share these resources amongst the population equally.
For this reason, he hated capitalism which he saw as a means to delegate resources to a small amount of people and deprive others of it.
He believed that in order to be happy you must 1. Be allowed to work out of your own free will and 2. Observe the conclusion of your efforts. An example of this is a group of engineers who gain great pleasure from seeing what their collective efforts created (perhaps a bridge or a building).
Think back to when you were a child and created or painted something. Did the very knowledge that you created what you see before you brought you pleasure? Karl Marx would argue that it is one of the only things that can bring a person true happiness.
This is another reason he hates capitalism because often what we produce is not credited to us but someone else entirely (a boss or an organisation).
Carl Marx believed that everyone should work according to what they are capable of doing and that people should get according to what they need.
His exact quote is: "From each according to his abilities, to each according to his needs."
Carl Marx also believed in equal rights for women and considered them as equals to men. His quote: "Anyone who knows anything of history knows that great social changes are impossible without feminine upheaval. Social progress can be measured exactly by the social position of the fair sex, the ugly ones included."
Quite importantly, he believed in altruism (the idea that humans are naturally good and will put others before themselves) and that sacrificing your own selfish wants for the good of others is where true happienss lies: "If we have chosen the position in life in which we can most of all work for mankind, no burdens can bow us down, because they are sacrifices for the benefit of all; then we shall experience no petty, limited, selfish joy, but our happiness will belong to millions, our deeds will live on quietly but perpetually at work, and over our ashes will be shed the hot tears of noble people."
Has this hub missed out an important and unarguable view of Karl Marx?