Efficiency in economics has a particular technical definition.

Pareto efficiency or Pareto optimality is a situation where no action or allocation is available that makes one individual better off without making another worse off

Free markets are great at producing outcomes that are efficient in a particular technical sense, but not especially equitable.

why are so many people starving?

There are loads of reasons for people starving, but in democratic capitalist countries, people typically don't starve. Don't agree? Name one. There is poverty in the US for sure and capitalism in the US is an absolute shitshow, nobody would deny that. But people in the US rarely starve to death.

Wanna talk starvation? Lets talk starvation! Warning: All following links are wikipedia but have stomach churning content. Here be dragons, but please do read because you need to learn. Also note: All the following is from within the last century.

1: Russian famine: about five million deaths

https://en.wikipedia.org/wiki/Russian_famine_of_1921%E2%80%931922 (famine caused directly by communism)

Quote from that page: The famine resulted from the combined effects of economic disturbance from the Russian Revolution, the Russian Civil War, and the government policy of war communism (especially prodrazvyorstka). It was exacerbated by rail systems that could not distribute food efficiently.

Fun quote: canibalism

Communism is awesome!

2: North Korean famine: estimated between 600,000 and 1 million deaths

https://en.wikipedia.org/wiki/North_Korean_famine (Famine caused directly by communist government policies)

Quote: Economic mismanagement and the loss of Soviet support caused food production and imports to decline rapidly. A series of floods and droughts exacerbated the crisis. The North Korean government and its centrally planned system proved too inflexible to effectively curtail the disaster.

Fun quote: uses of words such as 'famine' and 'hunger' were banned because they implied government failure

Communism is awesome!

3: Chinese famine: 15 to 55 million deaths (yay!)

https://en.wikipedia.org/wiki/Great_Chinese_Famine (Caused directly by communist government policies)

Quote: The major contributing factors in the famine were the policies of the Great Leap Forward (1958 to 1962) and people's communes, launched by Chairman of the Chinese Communist Party Mao Zedong, such as inefficient distribution of food within the nation's planned economy; requiring the use of poor agricultural techniques; the Four Pests campaign that reduced sparrow populations (which disrupted the ecosystem); over-reporting of grain production; and ordering millions of farmers to switch to iron and steel production.

Fun quote: Cannibalism, AGAIN

Communism is awesome!

Want to know more?

Communism wouldn’t have an upper class of “bosses”.

......... I don't even know where to begin with this one. What are you? 5?

https://en.wikipedia.org/wiki/Chekism a nice side effect of communism.

https://en.wikipedia.org/wiki/The_Chekist < I F*$#king double dare you to watch that movie about the non existing upper class of bosses

In conclusion?

Communism sucks and causes nothing but suffering. There is not even a fucking silver lining about it and people need to stop hippy-dippying communism. Its fucking evil.

Yes, capitalism as it currently runs is fucked up with problems. But at its core its the driver of success that got you your mobile phone in your hands. Use that mobile phone to fix those problems instead of dreaming of perfect mass murdering societies.