It's an interesting idea which I'm not ready to outright dismiss, but I think we have some evidence that it cannot be completely true. There are universal laws

It's an interesting idea which I'm not ready to outright dismiss, but I think we have some evidence that it cannot be completely true. There are universal laws of physics that have given shape to this reality which are not a result of conscious effort to conjure into existence. Look to things like germ theory causing illness well before anyone was consciously aware that it was a thing. Doctors were outright offended at the idea that they could in part be causing patient illness through unsanitary conditions. Still, I've been reading stories like some of those mentioned in this thread (ie: mandala effects) for years which really does make me wonder. I think my view of it tends to be that it's not that we're consciously creating or altering reality merely by having specific thoughts or through some type of force of will, but rather that the things we focus on tend to be shaped by that focus, because the focus and attention manifests in physical actions taken by us where we explore, discover, and build things related to that particular rabbit hole. It's how I've started thinking about the personal projects I work on. The quality of what I produce is a function of the quality of the initial idea + how much focus and attention I give to it. So on an individual level, if I continually have thoughts about a certain subject, these thoughts are likely to manifest in me taking actions which materially changes the universe. For example, I might be overweight and have thoughts about losing the weight, which might eventually lead to diet and exercise. On a more macro scale, I think if people are continually exposed to something they acclimate towards it. It becomes more acceptable. They might start to change their world views. So what enters into the consensus of collective consciousness (ie: large groups of people agreeing on, or at least focusing on a particular subject), it's people being continually pushed narratives and propaganda, as well as everyone being subject to the same laws of physics. For example, Trump either is or isn't a liar depending on the media sources you typically listen to. Another example would be climate change entering the masses consciousness and now (slowly) action being taken to combat it. This collective belief, similar to the losing weight example on an individual level, leads to collective action on a macro level. The universe bends to our will, but only if we are conscious enough to manifest that will. Until then we're just automatica burning the planet.