Are Karl Marx's ideas reasonable in todays world?

Answer 1

No. For all the theorizing Marx did that the excesses of capitalism would lead to its own destruction, usher in an era of socialism and eventually improve the plight of the working class, Marx has been proved wrong. Capitalism is still flourishing even in so called socialist and communist countries. The situation of the working class has actually improved with better working conditions, minimum wage scales and limits on the standard length of a typical work week. A large "middle class" that Marx disregarded as neglible then emerged and lessened the level of "oppression" of the working class by the upper class.