Evolution, the change in allele frequency over time in a population of organisms is a fact and is only controversial among a vanishingly few ideologues and practically no scientists. The theory of evolution by natural selection is supported by over 95% of all scientists and is not controversial among the scientific community because it has been observed and tested for 150 years. There are some religious ideologues who can not accept the evidences that refute their creation story, so they make evolutionary theory only controversial politically.
Political and controversial.
The Manhattan project was controversial because the result was the production of very dangerous nuclear bombs.
Modernization theory analyzes how the modernization of society in relation to technology takes place. Structuralism focuses on aspects of society that impede economic growth. The basic needs theory focuses on how people's basic needs affect how they interact with society.
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Herzberg's theory on motivation was highly controversial because he claimed that the topic could not be properly measured. The reason for this is because people are motivated and satisfied by different things.
Church officials believed the theory contradicted current religious teachings.
Church officials believed the theory contradicted current religious teachings
Complicate and new theories are continuously controversial; but this controverse is the source of progress in knowledge.
The theory that addiction is a disease is controversial.
The theory that addiction is a disease is controversial.
There is no evidence supporting it, and all the more evidence supporting the less controversial models of human evolution, based on evolutionary theory.
Germs couldn't be seen, so many didn't believe in them.
The cold fusion theory is controversial because it proposes a way to generate energy by fusing atoms at room temperature, contradicting traditional fusion theory. Many scientists are skeptical of cold fusion due to the lack of consistent, reproducible experimental results and the failure to explain the underlying mechanism adequately. The initial claim of cold fusion in 1989 was met with skepticism and debate in the scientific community, contributing to its controversial status.
Alfred Weqener's theory/ hypothesis was considered controversial because Alfred did not have an explanation for why the continents, North America, South America, Africa, Asia, Antarctica, Australia, and Europe have separated or moved.
Psychoanalytic theory became controversial due to its reliance on subjective interpretations of unconscious processes, lack of empirical evidence, and its emphasis on sexual and aggressive drives. Critics also raised concerns about its therapeutic efficacy and the authoritarian nature of the therapist-patient relationship. Additionally, the theory's focus on childhood experiences and repressed memories has been challenged by advancements in neuroscience and cognitive psychology.
The germ theory was controversial at the time but is now what are entire health system is based on. Without a belief in microorganisms we wouldn't be able to treat many diseases.